Error 500 on /admin/runners -- Runner decryption

Hello! Once upgraded Gitlab-CE up to 11.9.8 I faced with a 500 Error on /admin/runners page. In production.log there is

Started GET "/admin/runners" for 123.123.123.123 at 2019-04-19 12:55:52 +0000
Processing by Admin::RunnersController#index as HTML
Completed 500 Internal Server Error in 24ms (ActiveRecord: 8.3ms)

ActionView::Template::Error ():
    16:   .table-section.section-10
    17:     .table-mobile-header{ role: 'rowheader' }= _('Runner token')
    18:     .table-mobile-content
    19:       = link_to runner.short_sha, admin_runner_path(runner)
    20:
    21:   .table-section.section-20
    22:     .table-mobile-header{ role: 'rowheader' }= _('Description')

lib/gitlab/crypto_helper.rb:27:in `aes256_gcm_decrypt'
app/models/concerns/token_authenticatable_strategies/encrypted.rb:45:in `get_token'
app/models/concerns/token_authenticatable.rb:30:in `block in add_authentication_token_field'
app/models/ci/runner.rb:213:in `short_sha'
app/views/admin/runners/_runner.html.haml:19:in `_app_views_admin_runners__runner_html_haml__4263745679522226611_70083110453720'
app/views/admin/runners/index.html.haml:138:in `block in _app_views_admin_runners_index_html_haml___3773731710687400005_70083101966460'
app/views/admin/runners/index.html.haml:137:in `_app_views_admin_runners_index_html_haml___3773731710687400005_70083101966460'
app/controllers/application_controller.rb:116:in `render'
lib/gitlab/i18n.rb:55:in `with_locale'
lib/gitlab/i18n.rb:61:in `with_user_locale'
app/controllers/application_controller.rb:434:in `set_locale'
lib/gitlab/middleware/multipart.rb:103:in `call'
lib/gitlab/request_profiler/middleware.rb:16:in `call'
lib/gitlab/middleware/go.rb:20:in `call'
lib/gitlab/etag_caching/middleware.rb:13:in `call'
lib/gitlab/middleware/correlation_id.rb:16:in `block in call'
lib/gitlab/correlation_id.rb:15:in `use_id'
lib/gitlab/middleware/correlation_id.rb:15:in `call'
lib/gitlab/middleware/read_only/controller.rb:40:in `call'
lib/gitlab/middleware/read_only.rb:18:in `call'
lib/gitlab/middleware/basic_health_check.rb:25:in `call'
lib/gitlab/request_context.rb:26:in `call'
lib/gitlab/metrics/requests_rack_middleware.rb:29:in `call'
lib/gitlab/middleware/release_env.rb:13:in `call'

I tried the workaround from https://gitlab.com/gitlab-org/gitlab-ce/issues/55596 and reseted runners registrations tokens, but it didn't help. Downgrade to 11.9.7 didn't help as well.

Could you please point out what should I try else?