permission denied

Hi, I've got an issue with 1(!) subscription. Customer login only, admin user works fine here. Customer user has the Owner role, has all permissions checked. Subscription has almost all permission too. There is a "Settings" link near the account, on the email account lists. It points to Plesk...

Recently migrated some sites from a Cent OS 7.x to Alma using the migrator. The last time I used it it was great. This last time it basically sucked pretty bad but eventually got the job mostly done with one persisting issue: SOME not ALL domains get a permission denied when trying to access...