That sadly does not show the cause of your issue.
If you have backups, maybe restore them to see if the problem persists?
As I don’t know what’s causing the problem, and I’m reluctant to suggest symptom management, but I’m not sure what else to suggest than trying to reset the admin password(s).
Be sure to create proper backups before you proceed, as I’m worried that something else is still wrong with your environment. After you have created the backup, you can restore access to the admin console following this guide: https://discourse.igniterealtime.org/t/how-to-reset-admin-password-on-openfire-version-4-3-1/