After Restoring a backup, project page is not loading, all other pages are loading easily

Started GET “/gitadmin/jobseeker-new” for 223.190.56.103 at 2020-08-14 21:53:48 +0530
Processing by ProjectsController#show as HTML
Parameters: {“namespace_id”=>“gitadmin”, “id”=>“jobseeker-new”}
Completed 500 Internal Server Error in 345ms (ActiveRecord: 28.4ms | Elasticsearch: 0.0ms | Allocations: 76094)

ActionView::Template::Error ():
127: = render_if_exists ‘layouts/nav/sidebar/project_jira_issues_link’, issue_tracker: issue_tracker
128: - else
129: = nav_link do
130: = link_to issue_tracker.issue_tracker_path, target: ‘_blank’, rel: ‘noopener noreferrer’, class: ‘shortcuts-external_tracker’ do
131: .nav-icon-container
132: = sprite_icon(‘external-link’)
133: %span.nav-item-name

app/models/project_services/data_fields.rb:14:in url' app/models/project_services/issue_tracker_service.rb:63:in issue_tracker_path’
app/views/layouts/nav/sidebar/_project.html.haml:130
app/helpers/tab_helper.rb:78:in nav_link' app/views/layouts/nav/sidebar/_project.html.haml:129 app/views/layouts/_page.html.haml:3 app/views/layouts/application.html.haml:13 app/views/layouts/project.html.haml:14 app/controllers/application_controller.rb:134:in render’
app/controllers/application_controller.rb:546:in block in allow_gitaly_ref_name_caching' lib/gitlab/gitaly_client.rb:325:in allow_ref_name_caching’
app/controllers/application_controller.rb:545:in allow_gitaly_ref_name_caching' app/controllers/application_controller.rb:491:in set_current_admin’
lib/gitlab/session.rb:11:in with_session' app/controllers/application_controller.rb:482:in set_session_storage’
lib/gitlab/i18n.rb:55:in with_locale' lib/gitlab/i18n.rb:61:in with_user_locale’
app/controllers/application_controller.rb:476:in set_locale' lib/gitlab/error_tracking.rb:50:in with_context’
app/controllers/application_controller.rb:541:in sentry_context' app/controllers/application_controller.rb:469:in block in set_current_context’
lib/gitlab/application_context.rb:52:in block in use' lib/gitlab/application_context.rb:52:in use’
lib/gitlab/application_context.rb:20:in with_context' app/controllers/application_controller.rb:462:in set_current_context’
lib/gitlab/request_profiler/middleware.rb:17:in call' lib/gitlab/middleware/go.rb:20:in call’
lib/gitlab/etag_caching/middleware.rb:13:in call' lib/gitlab/middleware/multipart.rb:140:in call’
lib/gitlab/middleware/read_only/controller.rb:51:in call' lib/gitlab/middleware/read_only.rb:18:in call’
lib/gitlab/middleware/same_site_cookies.rb:27:in call' lib/gitlab/middleware/basic_health_check.rb:25:in call’
lib/gitlab/middleware/handle_ip_spoof_attack_error.rb:25:in call' lib/gitlab/middleware/request_context.rb:23:in call’
config/initializers/fix_local_cache_middleware.rb:9:in call' lib/gitlab/metrics/requests_rack_middleware.rb:60:in call’
lib/gitlab/middleware/release_env.rb:12:in `call’
Started GET “/favicon.ico” for 223.190.56.103 at 2020-08-14 21:53:49 +0530
Started GET “/uploads/-/system/appearance/favicon/1/favicon.ico” for 223.190.56.103 at 2020-08-14 21:53:49 +0530
Processing by UploadsController#show as HTML
Parameters: {“model”=>“appearance”, “mounted_as”=>“favicon”, “id”=>“1”, “filename”=>“favicon.ico”}
Sent file /opt/gitlab/embedded/service/gitlab-rails/public/uploads/-/system/appearance/favicon/1/favicon.ico (0.5ms)
Completed 200 OK in 345ms (ActiveRecord: 39.0ms | Elasticsearch: 0.0ms | Allocations: 106174)
Started GET “/-/metrics” for 127.0.0.1 at 2020-08-14 21:53:57 +0530
Processing by MetricsController#index as HTML
Completed 200 OK in 2ms (Views: 0.9ms | ActiveRecord: 0.0ms | Elasticsearch: 0.0ms | Allocations: 309)

Server : cent os 8

Gitlab ce version : 13.2.4 el8 repo

Backup from 11.0 was successful but project pages are not loading.

Got the same issue from a backup made from a debian 10 source install on 13.2.6 where jira integration was activated. As I was trying to migrate on an omnibus install I tried to import on 13.2.6-ce using both docker and gitlab repo for debian 10 and I end up on the same issue everytime.

Here is the bug report I reported on debian package tracker. It seems to be a similar issue. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=968971