PHP/Openssl issue with Backup kicking off

I downloaded and setup Backup. it ran once but now I’m getting an error message in the log.
Error: openssl_encrypt(): IV passed is only 12 bytes long, cipher expects an IV of precisely 16 bytes, padding with \0 at /var/www/nextcloud/apps/backup/lib/Service/EncryptService.php#210

So the simple question is: What is the error and how do I correct it?
Thanks for the help in advance

Here is the bug report

Seems that is a bug report. Found this.

Ok. So it sounds like a bug that the author of the app needs to work out. Certainly doesn’t look like anything I can fix.
Thanks for the quick reply.