Drupal 7 Backups Cease after Host Account Upgrade

You will also get the favicon.ico message on Drupal sites without the BAM module and even on non-Drupal sites (in my experience), so I consider it unlikely that this has anything to do with your problem. You are correct in stating that the favicon.ico file is a resource/asset, not a page, but if that is a bug, it is a bug against Drupal core, not BAM.

Thanks for checking the log though, that is always useful.

If you use a different destination and remove the FTP destination for now (make a backup of your settings first), do you still get the blank screen?

BrankoC:

Yes, I tried different destinations, even creating a new one.
All give me the blank screen when I click "Backup now".

In addition, I noticed that the Offsite Destinations have disappeared - maybe because FTP was being used.

It's a big problem not having reliable and secure, regular backups.
I wish there was another module that did that.
Backup and Migrate has given me problems ever since I installed it years ago.

Any ideas?

I just realised that since it doesn't matter which destination you use, the switch to SFTP may not be the culprit.

I currently have no way to test against PHP 7.4, so hopefully somebody else can look into this.