Comment 1 for bug 2033886

The root cause for this error is a race condition between mgr enablement and certificates relation handle:

Log Print:
2023-08-29T23:17:47.373+0000 7f168d179640 -1 mgr.server reply reply (95) Operation not supported Module 'dashboard' is not enabled (required by command 'dashboard set-ssl-certificate'): use ceph mgr module enable dashboard to enable it

The newly split event handlers require to defer the handling until dashboard mgr module is enabled.