Redmine

Unable to upload file, getting as "error" refer screenshot. We tried increasing the file Size from Admin login, however the problem still persists. Please help

My current version
Environment:
Redmine version 4.1.1.stable
Ruby version 2.5.8-p224 (2020-03-31) [x64-mingw32]
Rails version 5.2.4.2
Environment production
Database adapter Mysql2
Mailer queue ActiveJob::QueueAdapters::AsyncAdapter
Mailer delivery smtp
SCM:
Git 2.26.1
Filesystem
Redmine plugins:
no plugin installed