When error posted "Backup Halted and Will Resume Automatically", I let it resume on its own until it came up with the error to Analyse Log File. I clicked on View Log, and it was blank, so I didn't bother attaching it.
Hosting has plenty of space to process backup. I've tried processing to Google Drive, DropBox, and even on the server itself: still error message.
Uninstalled/reinstalled PRO version
AJAX Loading Error
HTTP Status: 500 (Internal Server Error)
Internal status: error
XHR ReadyState: 4
Raw server response:
(HTML containing script tags)
JPA (also tried ZIP)
Dereference symlinks (checked)
Part size for split archives Custom 2047.88 (I've also tried 10MB and 20MB--same result)
Chunk size for large files processing: 1.00
Big file threshold 1.00