No users listed in "Share to user" drop down

I have 1 admin and 2 users accounts. When I try to share a library from one to another account the drop down list is empty. Seafile Pro 7.1.9

I suggest you update to the latest version, the UI will tell you to type characters to begin search.

I will try. Do I have to upgrade to v8, then v9, 10 and finally 11? I’m running a Docker stack, I’m not very fluent with Docker so I’m not sure how to upgrade. Using Portainer