Snapshot stops backing up Files

I have problems with Snapshot at the moment ...

1) It either skips backing up Files or it stops 46% of the way through backing up Files.

2) Snapshot forgets my AWS bucket settings each time I log-out of Wordpress

FYI, I have a hunch that there is a conflict with Cloner. Before I installed this plug-in, Snapshot was fine. I have since deleted Cloner but it has not made any difference to the above issues.

Happy to provide admin access if that will help.