Error 500 when open a issue was closed and created from a risks Plugin (not Redmine based issue)

[vvbasti]

Rendered plugins/redmine_risks/app/views/risks/_relations.html.erb (8.6ms)
Rendered plugins/redmine_risks/app/views/risks/_history.html.erb (3.4ms)
Rendered plugins/redmine_risks/app/views/risks/show.html.erb within layouts/base (26.4ms)
Completed 500 Internal Server Error in 45ms (ActiveRecord: 4.6ms)

ActionView::Template::Error (undefined method hidden_attribute?' for nil:NilClass): 10: 11: <% if journal.details.any? %> 12: <ul class="details"> 13: <% details_to_strings(journal.visible_details).each do |string| %> 14: <li><%= string %></li> 15: <% end %> 16: </ul> plugins/redmine_workflow_hidden_fields/lib/redmine_workflow_hidden_fields/issues_helper_patch.rb:40:in block in details_to_strings_with_hidden'
plugins/redmine_workflow_hidden_fields/lib/redmine_workflow_hidden_fields/issues_helper_patch.rb:39:in each' plugins/redmine_workflow_hidden_fields/lib/redmine_workflow_hidden_fields/issues_helper_patch.rb:39:in details_to_strings_with_hidden'
plugins/redmine_risks/app/views/risks/_history.html.erb:13:in block in _9ef1c303fa0425365436bdfd48e1e896' plugins/redmine_risks/app/views/risks/_history.html.erb:3:in each'
plugins/redmine_risks/app/views/risks/_history.html.erb:3:in _9ef1c303fa0425365436bdfd48e1e896' plugins/redmine_risks/app/views/risks/show.html.erb:80:in _82a18f886499e53960e08226d9362e00'
plugins/redmine_risks/app/controllers/risks_controller.rb:75:in block (2 levels) in show' plugins/redmine_risks/app/controllers/risks_controller.rb:73:in show'
lib/redmine/sudo_mode.rb:63:in `sudo_mode'

[dzzrit]

I have also encountered this issue, redmine 5.0. x
Has anyone solved this problem?