Redmine

• use git scm
• change git path
• now when I open changeset path, internal server error occur
• upgraded redmine 2.5 to 2.6
• try the following script, but still error

rails runner "Repository.fetch_changesets" -e production

• error log:

Processing by RepositoriesController#show as HTML
  Parameters: {"id"=>"cool-project"}
  Current user: user_asik (id=1)
  Rendered repositories/_navigation.html.erb (22.2ms)
  Rendered repositories/_breadcrumbs.html.erb (2.2ms)
  Rendered repositories/_dir_list_content.html.erb (21.4ms)
  Rendered repositories/_dir_list.html.erb (22.3ms)
  Rendered repositories/_revision_graph.html.erb (12.2ms)
  Rendered repositories/_revisions.html.erb (171.0ms)
  Rendered repositories/show.html.erb within layouts/base (237.0ms)
Completed 200 OK in 412ms (Views: 262.7ms | ActiveRecord: 31.2ms)
Started GET "/projects/cool-project/repository/revisions/1e8975acf15cf8e7ae2b39dff91dda54514ff599" for xxxx at 2014-10-30 10:15:01 +0000
Processing by RepositoriesController#revision as HTML
  Parameters: {"id"=>"cool-project", "rev"=>"1e8975acf15cf8e7ae2b39dff91dda54514ff599"}
  Current user: user_asik (id=1)
  Rendered repositories/_related_issues.html.erb (21.0ms)
  Rendered repositories/revision.html.erb within layouts/base (68.0ms)
Completed 500 Internal Server Error in 84ms

ActionView::Template::Error (First argument in form cannot contain nil or be empty):
    24: </ul>
    25:
    26: <% if manage_allowed %>
    27:   <%= form_for(@issue, :as => :issue, :remote => true,
    28:        :url => {:controller => 'repositories', :action => 'add_related_issue',
    29:                 :id => @project, :repository_id => @repository.identifier_param,
    30:                 :rev => @changeset.identifier},
  app/views/repositories/_related_issues.html.erb:27:in `_app_views_repositories__related_issues_html_erb__3690622906488479603_14833100'
  app/views/repositories/revision.html.erb:68:in `_app_views_repositories_revision_html_erb__904111724266771141_32365200'
  app/controllers/repositories_controller.rb:223:in `revision'