Unable to access user directory in bitbucket admin center

[Horolin]

Hello, 
We are running bitbucket Server 5.16.0.
Users are synchronized from an AD and some are in the internal bitbucket directory.
After deleting a user in the internal bitbucket directory, it is now not possible to display the administration page for configured user directories.
We have the following error message : 

Could not find servlet for: /bitbucket/plugins/servlet/embedded-crowd/directories/list

My question is how to fix this problem?

thanks in advance
Best regards
horolin 

[Nic Brough -Adaptavist-]

I think you may have run into https://confluence.atlassian.com/confkb/unable-to-access-user-directories-screen-after-deletion-of-an-user-directory-355369112.html