Redmine

Currently, if I logged on as regular user to my redmine installation of 3.4.1; I can see the list of projects, but when I tried to open any "Project", I got the following:

Internal error

An error occurred on the page you were trying to access.
If you continue to experience problems please contact your Redmine administrator for assistance.

If you are the Redmine administrator, check your log files for details about the error.

If I opened the log, I see this "error":
NoMethodError (undefined method `accessor' for #<ActiveRecord::Type::Value:0x000000036cfce8>):

  app/models/role.rb:229:in `permissions_all_trackers'
  app/models/role.rb:238:in `permissions_all_trackers?'
  app/models/tracker.rb:61:in `block (2 levels) in <class:Tracker>'
  app/models/project.rb:217:in `block in allowed_to_condition'
  app/models/project.rb:216:in `each'
  app/models/project.rb:216:in `allowed_to_condition'
  app/models/tracker.rb:60:in `block in <class:Tracker>'
  app/controllers/projects_controller.rb:152:in `show'
  lib/redmine/sudo_mode.rb:63:in `sudo_mode'

I then logged on as "Admin", I can then open the project. I then tried to looking inside "Settings" to see if there is something peculiar but got the internal error again, and this time the error in the log file is a little different:

  ActionView::Template::Error (undefined method `default_assigned_to_id' for #<Project:0x007f4611fb2878>
Did you mean?  default_assigned_to
               default_assigned_to=):
    25: <% end %>
    26: 
    27: <% if @project.safe_attribute?('default_assigned_to_id') && (default_assigned_to_options = project_default_assigned_to_options(@project)).present? %>
    28:   <p><%= f.select :default_assigned_to_id, default_assigned_to_options, include_blank: true %></p>
    29: <% end %>
    30: 
    31: <%= wikitoolbar_for 'project_description' %>
  lib/redmine/views/labelled_form_builder.rb:38:in `select'
  app/views/projects/_form.html.erb:28:in `_app_views_projects__form_html_erb__2072855206031296453_69969313185660'
  app/views/projects/_edit.html.erb:2:in `block in _app_views_projects__edit_html_erb___116871158613782057_69969313241060'
  app/helpers/application_helper.rb:1188:in `labelled_form_for'
  app/views/projects/_edit.html.erb:1:in `_app_views_projects__edit_html_erb___116871158613782057_69969313241060'
  app/views/common/_tabs.html.erb:17:in `block in _app_views_common__tabs_html_erb__1006688546081786105_69969313437680'
  app/views/common/_tabs.html.erb:16:in `each'
  app/views/common/_tabs.html.erb:16:in `_app_views_common__tabs_html_erb__1006688546081786105_69969313437680'
  app/helpers/application_helper.rb:343:in `render_tabs'
  app/views/projects/settings.html.erb:3:in `_app_views_projects_settings_html_erb___3324488570488824154_69969313523340'
  lib/redmine/sudo_mode.rb:63:in `sudo_mode'

I installed Redmine using "regular" account that does not have superuser privilege. I am pretty sure it was working before and I don't remember making any changes to the setup/configuration except for the attempt with starting on Apache/Tomcat which basically did a copy of public/dispatch.fcgi.example to public/dispatch.fcgi; but I had already removed that file and restart Redmine and the problem persisted.

Below is my environment.

[<user>@<server> redmine-3.4.1]$ RAILS_ENV=production bin/about

sh: darcs: command not found
sh: hg: command not found
sh: bzr: command not found
Environment:
  Redmine version                3.4.1.stable
  Ruby version                   2.4.1-p111 (2017-03-22) [x86_64-linux]
  Rails version                  4.2.8
  Environment                    production
  Database adapter               Mysql2
SCM:
  Subversion                     1.6.19
  Cvs                            1.12.13
  Git                            2.13.0
  Filesystem                     
Redmine plugins:
  no plugin installed

[<user>@<server> redmine-3.4.1]$ uname -a
Linux <server> 2.6.32-642.6.2.el6.x86_64 #1 SMP Mon Oct 24 10:22:33 EDT 2016 x86_64 GNU/Linux