2.3.8 and 2.3.9 updates claimed failure

[volas (Alexander V)]

Same problem (2.3.8 to 2.3.9), /admin :

and /admin/upgrade :

Unfortunately I closed upgrade page with logs, can’t find them anywhere else. Only this in /logs

Discourse::NotFound (Discourse::NotFound)
/var/www/discourse/plugins/docker_manager/app/controllers/docker_manager/admin_controller.rb:89:in `upgrade'