Redmine

I installed Redmine 3.0.1 on Ubuntu 14.04.2, but when trying to access it I get the message: "Web application could not be started". Running the command "gem update bundler" did not help. Below is the complete error message:

Web application could not be started
Redmine requires Bundler 1.5.0 or higher (you're using 1.3.5).
Please update with 'gem update bundler'. (SystemExit)
  /usr/share/redmine-3.0.1/Gemfile:4:in `abort'
  /usr/share/redmine-3.0.1/Gemfile:4:in `eval_gemfile'
  /usr/lib/ruby/vendor_ruby/bundler/dsl.rb:30:in `instance_eval'
  /usr/lib/ruby/vendor_ruby/bundler/dsl.rb:30:in `eval_gemfile'
  /usr/lib/ruby/vendor_ruby/bundler/dsl.rb:9:in `evaluate'
  /usr/lib/ruby/vendor_ruby/bundler/definition.rb:19:in `build'
  /usr/lib/ruby/vendor_ruby/bundler.rb:148:in `definition'
  /usr/lib/ruby/vendor_ruby/bundler.rb:116:in `setup'
  /usr/lib/ruby/vendor_ruby/bundler/setup.rb:17:in `<top (required)>'
  /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
  /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
  /usr/lib/ruby/vendor_ruby/phusion_passenger/loader_shared_helpers.rb:245:in `block in run_load_path_setup_code'
  /usr/lib/ruby/vendor_ruby/phusion_passenger/loader_shared_helpers.rb:348:in `running_bundler'
  /usr/lib/ruby/vendor_ruby/phusion_passenger/loader_shared_helpers.rb:243:in `run_load_path_setup_code'
  /usr/share/passenger/helper-scripts/rack-preloader.rb:100:in `preload_app'
  /usr/share/passenger/helper-scripts/rack-preloader.rb:158:in `<module:App>'
  /usr/share/passenger/helper-scripts/rack-preloader.rb:29:in `<module:PhusionPassenger>'
  /usr/share/passenger/helper-scripts/rack-preloader.rb:28:in `<main>'
Application root
/var/www/redmine
Environment (value of RAILS_ENV, RACK_ENV, WSGI_ENV and PASSENGER_ENV)
production
Ruby interpreter command
/usr/bin/ruby
User and groups
uid=33(www-data) gid=33(www-data) groups=33(www-data)
Environment variables
APACHE_RUN_DIR = /var/run/apache2
APACHE_PID_FILE = /var/run/apache2/apache2.pid
PATH = /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
APACHE_LOCK_DIR = /var/lock/apache2
LANG = C
APACHE_RUN_USER = www-data
APACHE_RUN_GROUP = www-data
APACHE_LOG_DIR = /var/log/apache2
PWD = /var/www/redmine
PASSENGER_DEBUG_DIR = /tmp/passenger.spawn-debug.XXXXOLo6fv
USER = www-data
LOGNAME = www-data
SHELL = /usr/sbin/nologin
HOME = /var/www
IN_PASSENGER = 1
PYTHONUNBUFFERED = 1
NODE_PATH = /usr/share/passenger/node
RAILS_ENV = production
RACK_ENV = production
WSGI_ENV = production
NODE_ENV = production
PASSENGER_APP_ENV = production
SERVER_PROTOCOL = HTTP/1.1
SERVER_ADDR = 192.168.1.102
REMOTE_ADDR = 192.168.1.105
REQUEST_URI = /
SERVER_PORT = 80
SERVER_NAME = 192.168.1.102
SERVER_SOFTWARE = Apache/2.4.7 (Ubuntu)
SERVER_ADMIN = support@redmine.local
REMOTE_PORT = 2912
DOCUMENT_ROOT = /var/www/redmine/public
QUERY_STRING = 
REQUEST_METHOD = GET
GEM_PATH = /var/lib/gems/1.9.1:/var/www/.gem/ruby/1.9.1:/usr/share/rubygems-integration/1.9.1:/usr/share/rubygems-integration/all
GEM_HOME = /var/lib/gems/1.9.1
Ulimits
Unknown
System memory usage
             total       used       free     shared    buffers     cached
Mem:           496        343        153          5         35        218
-/+ buffers/cache:         88        407
Swap:          987          0        987
General Ruby interpreter information
RUBY_VERSION = 1.9.3
RUBY_PLATFORM = i686-linux
RUBY_ENGINE = ruby
RubyGems version = 1.8.23
Ruby configuration (RbConfig::CONFIG)
DESTDIR = 
MAJOR = 1
MINOR = 9
TEENY = 1
PATCHLEVEL = 484
INSTALL = /usr/bin/install -c
EXEEXT = 
prefix = /usr
ruby_install_name = ruby1.9.1
RUBY_INSTALL_NAME = ruby1.9.1
RUBY_SO_NAME = ruby-1.9.1
exec = exec
ruby_pc = ruby-1.9.pc
PACKAGE = ruby
BUILTIN_TRANSSRCS =  newline.c
USE_RUBYGEMS = YES
MANTYPE = doc
NROFF = /usr/bin/nroff
vendorhdrdir = /usr/include/ruby-1.9.1/vendor_ruby
sitehdrdir = /usr/include/ruby-1.9.1/site_ruby
rubyhdrdir = /usr/include/ruby-1.9.1
UNIVERSAL_INTS = 
UNIVERSAL_ARCHNAMES = 
configure_args =  '--build=i686-linux-gnu' '--prefix=/usr' '--includedir=/usr/include' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--libexecdir=/usr/lib/ruby1.9.1' '--srcdir=.' '--disable-maintainer-mode' '--disable-dependency-tracking' '--disable-silent-rules' '--enable-frame-address' '--enable-pthread' '--enable-shared' '--disable-rpath' '--disable-install-doc' '--with-vendordir=/usr/lib/ruby/vendor_ruby' '--with-sitedir=/usr/local/lib/site_ruby' '--program-suffix=1.9.1' '--with-soname=ruby-1.9.1' '--enable-ipv6' '--with-dbm-type=gdbm_compat' '--with-tklib=tk8.5' '--with-tcllib=tcl8.5' '--with-tcl-include=/usr/include/tcl8.5' '--with-tk-include=/usr/include/tcl8.5' '--with-tcl-lib=/usr/lib/i386-linux-gnu' '--with-tk-lib=/usr/lib/i386-linux-gnu' '--with-bundled-sha1' '--with-bundled-md5' '--with-bundled-rmd160' 'build_alias=i686-linux-gnu' 'CFLAGS=-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall -fno-strict-aliasing' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro -L/build/buildd/ruby1.9.1-1.9.3.484/debian/lib' 'CPPFLAGS=-D_FORTIFY_SOURCE=2' 'CXXFLAGS=-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall -fno-strict-aliasing'
vendordir = /usr/lib/ruby/vendor_ruby
sitedir = /usr/local/lib/site_ruby
ruby_version = 1.9.1
sitearch = i686-linux
arch = i686-linux
RI_BASE_NAME = ri
ridir = /usr/share/ri
rubylibprefix = /usr/lib/ruby
MAKEFILES = Makefile
PLATFORM_DIR = 
THREAD_MODEL = pthread
SYMBOL_PREFIX = 
EXPORT_PREFIX = 
COMMON_HEADERS = 
COMMON_MACROS = 
COMMON_LIBS = 
MAINLIBS = 
ENABLE_SHARED = yes
DLDLIBS =  -lc
SOLIBS = -lpthread -lrt -ldl -lcrypt -lm 
LIBRUBYARG_SHARED = -lruby-1.9.1
LIBRUBYARG_STATIC = -lruby-1.9.1-static
LIBRUBYARG = -lruby-1.9.1
LIBRUBY = libruby-1.9.1.so.1.9.1
LIBRUBY_ALIASES = libruby-1.9.1.so.1.9 libruby-1.9.1.so
LIBRUBY_SO = libruby-1.9.1.so.1.9.1
LIBRUBY_A = libruby-1.9.1-static.a
RUBYW_INSTALL_NAME = 
rubyw_install_name = 
LIBRUBY_DLDFLAGS = -Wl,-soname,libruby-1.9.1.so.1.9
LIBRUBY_LDSHARED = gcc -shared
EXTDLDFLAGS = 
warnflags = -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration
debugflags = -ggdb
optflags = -O3
cxxflags =  -O3 -ggdb -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration
cflags =  -O3 -ggdb -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration
cppflags = -D_FORTIFY_SOURCE=2
NULLCMD = :
INSTALLDOC = nodoc
CAPITARGET = nodoc
RDOCTARGET = nodoc
EXECUTABLE_EXTS = 
ARCHFILE = 
LIBRUBY_RELATIVE = no
EXTOUT = .ext
PREP = miniruby
TEST_RUNNABLE = yes
setup = Setup
EXTSTATIC = 
STRIP = strip -S -x
TRY_LINK = 
LIBPATHENV = LD_LIBRARY_PATH
RPATHFLAG = 
LIBPATHFLAG =  -L%s
LINK_SO = 
LIBEXT = a
DLEXT2 = 
DLEXT = so
LDSHAREDXX = g++ -shared
LDSHARED = gcc -shared
CCDLFLAGS = -fPIC
STATIC = 
ARCH_FLAG = 
DLDFLAGS = 
ALLOCA = 
POSTLINK = :
WERRORFLAG = -Werror
CHDIR = cd -P
RMALL = rm -fr
RMDIRS = rmdir --ignore-fail-on-non-empty -p
RMDIR = rmdir --ignore-fail-on-non-empty
CP = cp
RM = rm -f
PKG_CONFIG = pkg-config
DOXYGEN = 
DOT = 
MAKEDIRS = /bin/mkdir -p
MKDIR_P = /bin/mkdir -p
INSTALL_DATA = /usr/bin/install -c -m 644
INSTALL_SCRIPT = /usr/bin/install -c
INSTALL_PROGRAM = /usr/bin/install -c
SET_MAKE = 
LN_S = ln -s
NM = nm
DLLWRAP = 
WINDRES = 
OBJCOPY = :
OBJDUMP = objdump
ASFLAGS = 
AS = as
AR = ar
RANLIB = ranlib
try_header = 
COUTFLAG = -o 
OUTFLAG = -o 
CPPOUTFILE = -o conftest.i
GNU_LD = yes
GCC = yes
EGREP = /bin/grep -E
GREP = /bin/grep
CPP = gcc -E
CXXFLAGS = -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall -fno-strict-aliasing
CXX = g++
OBJEXT = o
CPPFLAGS = -D_FORTIFY_SOURCE=2 -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2
LDFLAGS = -L. -Wl,-Bsymbolic-functions -Wl,-z,relro -L/build/buildd/ruby1.9.1-1.9.3.484/debian/lib -rdynamic -Wl,-export-dynamic
CFLAGS = -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall -fno-strict-aliasing -fPIC
CC = gcc
target_os = linux
target_vendor = pc
target_cpu = i686
target = i686-pc-linux-gnu
host_os = linux-gnu
host_vendor = pc
host_cpu = i686
host = i686-pc-linux-gnu
RUBYW_BASE_NAME = rubyw
RUBY_BASE_NAME = ruby
build_os = linux-gnu
build_vendor = pc
build_cpu = i686
build = i686-pc-linux-gnu
RUBY_RELEASE_DATE = 2013-11-22
RUBY_PROGRAM_VERSION = 1.9.3
BASERUBY = ruby
target_alias = 
host_alias = 
build_alias = i686-linux-gnu
LIBS = -lpthread -lrt -ldl -lcrypt -lm 
ECHO_T = 
ECHO_N = -n
ECHO_C = 
DEFS = -D_FILE_OFFSET_BITS=64
mandir = /usr/share/man
localedir = /usr/share/locale
libdir = /usr/lib
psdir = /usr/share/doc/ruby
pdfdir = /usr/share/doc/ruby
dvidir = /usr/share/doc/ruby
htmldir = /usr/share/doc/ruby
infodir = /usr/share/info
docdir = /usr/share/doc/ruby
oldincludedir = /usr/include
includedir = /usr/include
localstatedir = /var
sharedstatedir = /usr/com
sysconfdir = /etc
datadir = /usr/share
datarootdir = /usr/share
libexecdir = /usr/lib/ruby1.9.1
sbindir = /usr/sbin
bindir = /usr/bin
program_transform_name = s&$&1.9.1&;s&^&&
exec_prefix = /usr
PACKAGE_URL = 
PACKAGE_BUGREPORT = 
PACKAGE_STRING = 
PACKAGE_VERSION = 
PACKAGE_TARNAME = 
PACKAGE_NAME = 
PATH_SEPARATOR = :
SHELL = /bin/bash
rubylibdir = /usr/lib/ruby/1.9.1
archdir = /usr/lib/ruby/1.9.1/i686-linux
sitelibdir = /usr/local/lib/site_ruby/1.9.1
sitearchdir = /usr/local/lib/site_ruby/1.9.1/i686-linux
vendorlibdir = /usr/lib/ruby/vendor_ruby/1.9.1
vendorarchdir = /usr/lib/ruby/vendor_ruby/1.9.1/i686-linux
topdir = /usr/lib/ruby/1.9.1/i686-linux
Ruby load path ($LOAD_PATH)
/usr/local/lib/site_ruby/1.9.1
/usr/local/lib/site_ruby/1.9.1/i686-linux
/usr/local/lib/site_ruby
/usr/lib/ruby/vendor_ruby/1.9.1
/usr/lib/ruby/vendor_ruby/1.9.1/i686-linux
/usr/lib/ruby/vendor_ruby
/usr/lib/ruby/1.9.1
/usr/lib/ruby/1.9.1/i686-linux
Ruby loaded libraries ($LOADED_FEATURES)
enumerator.so
/usr/lib/ruby/1.9.1/i686-linux/enc/encdb.so
/usr/lib/ruby/1.9.1/i686-linux/enc/trans/transdb.so
/usr/lib/ruby/1.9.1/rubygems/defaults.rb
/usr/lib/ruby/1.9.1/i686-linux/rbconfig.rb
/usr/lib/ruby/1.9.1/rubygems/deprecate.rb
/usr/lib/ruby/1.9.1/rubygems/exceptions.rb
/usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb
/usr/lib/ruby/1.9.1/rubygems.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger.rb
/usr/lib/ruby/1.9.1/i686-linux/etc.so
/usr/lib/ruby/1.9.1/fileutils.rb
/usr/lib/ruby/1.9.1/tmpdir.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/utils/tmpio.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/platform_info.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/platform_info/operating_system.rb
/usr/lib/ruby/vendor_ruby/1.9.1/i686-linux/passenger_native_support.so
/usr/lib/ruby/vendor_ruby/phusion_passenger/native_support.rb
/usr/lib/ruby/1.9.1/i686-linux/socket.so
/usr/lib/ruby/1.9.1/socket.rb
/usr/lib/ruby/1.9.1/thread.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/ruby_core_enhancements.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/utils/tmpdir.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/preloader_shared_helpers.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/constants.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/public_api.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/debug_logging.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/loader_shared_helpers.rb
/usr/lib/ruby/1.9.1/i686-linux/fcntl.so
/usr/lib/ruby/vendor_ruby/phusion_passenger/message_channel.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/utils.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/message_client.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/utils/native_support_utils.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/utils/unseekable_socket.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler/thread_handler.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler.rb
/usr/lib/ruby/1.9.1/i686-linux/stringio.so
/usr/lib/ruby/vendor_ruby/phusion_passenger/utils/tee_input.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/rack/thread_handler_extension.rb
/usr/lib/ruby/vendor_ruby/phusion_passenger/analytics_logger.rb
/usr/lib/ruby/1.9.1/i686-linux/pathname.so
/usr/lib/ruby/1.9.1/pathname.rb
/usr/lib/ruby/1.9.1/rubygems/user_interaction.rb
/usr/lib/ruby/1.9.1/rubygems/config_file.rb
/usr/lib/ruby/1.9.1/rubygems/version.rb
/usr/lib/ruby/vendor_ruby/bundler/rubygems_integration.rb
/usr/lib/ruby/1.9.1/rubygems/requirement.rb
/usr/lib/ruby/1.9.1/rubygems/dependency.rb
/usr/lib/ruby/vendor_ruby/bundler/shared_helpers.rb
/usr/lib/ruby/vendor_ruby/bundler/gem_path_manipulation.rb
/usr/lib/ruby/1.9.1/rubygems/platform.rb
/usr/lib/ruby/1.9.1/rubygems/specification.rb
/usr/lib/ruby/vendor_ruby/bundler/gem_helpers.rb
/usr/lib/ruby/vendor_ruby/bundler/match_platform.rb
/usr/lib/ruby/vendor_ruby/bundler/rubygems_ext.rb
/usr/lib/ruby/vendor_ruby/bundler/version.rb
/usr/lib/ruby/vendor_ruby/bundler.rb
/usr/lib/ruby/vendor_ruby/bundler/settings.rb
/usr/lib/ruby/1.9.1/rubygems/path_support.rb
/usr/lib/ruby/1.9.1/i686-linux/digest.so
/usr/lib/ruby/1.9.1/digest.rb
/usr/lib/ruby/1.9.1/i686-linux/digest/sha1.so
/usr/lib/ruby/1.9.1/set.rb
/usr/lib/ruby/vendor_ruby/bundler/definition.rb
/usr/lib/ruby/vendor_ruby/bundler/dependency.rb
/usr/lib/ruby/vendor_ruby/bundler/ruby_dsl.rb
/usr/lib/ruby/vendor_ruby/bundler/dsl.rb
/usr/lib/ruby/vendor_ruby/bundler/source.rb
/usr/lib/ruby/1.9.1/uri/common.rb
/usr/lib/ruby/1.9.1/uri/generic.rb
/usr/lib/ruby/1.9.1/uri/ftp.rb
/usr/lib/ruby/1.9.1/uri/http.rb
/usr/lib/ruby/1.9.1/uri/https.rb
/usr/lib/ruby/1.9.1/uri/ldap.rb
/usr/lib/ruby/1.9.1/uri/ldaps.rb
/usr/lib/ruby/1.9.1/uri/mailto.rb
/usr/lib/ruby/1.9.1/uri.rb
/usr/lib/ruby/1.9.1/rubygems/remote_fetcher.rb
/usr/lib/ruby/1.9.1/rubygems/errors.rb
/usr/lib/ruby/1.9.1/rubygems/text.rb
/usr/lib/ruby/1.9.1/rubygems/spec_fetcher.rb
/usr/lib/ruby/vendor_ruby/bundler/source/rubygems.rb