The tabs are not showed correctly, buttons and information is lost after the switch between tabs

ActionView::Template::Error ('nil' is not an ActiveModel-compatible object. It must implement :to_partial_path.):
2: @tab = params[:tab_name]
3: @partial = params[:partial]
4: >
5: $('#tab-placeholder-<= @tab >').html("<= j(render :partial => @partial) %>")
plugins/redmine_contacts/app/views/contacts/load_tab.js.erb:5:in `_plugins_redmine_contacts_app_views_contacts_load_tab_js_erb__1701681990135225989_70252327323520'
lib/redmine/sudo_mode.rb:63:in `sudo_mode'

http://localhost:4000/contacts/2/load_tab?tab_name=undefined&_=1590804428895