Redmine

When I create a new Project in redmine, I am getting ActionController::UrlGenerationError in Projects#settings. See attachment - [screenshot-localhost-3000-2018-01-02-16-25-05-827.png]

Then, if I check projects tab, I can see the project there as already saved. See attachment - [screenshot-localhost-3000-2018-01-02-16-26-10-219.png]

Then, if I click on the project, it again displays the same error ActionController::UrlGenerationError in Projects#show. See attachment - [screenshot-localhost-3000-2018-01-02-16-26-47-205.png]

I don't have prior experience in Ruby on Rails. So can someone guide me how I can troubleshoot and fix this issue?