I have a similar error, Importbuddy offers option to wipe all tables before start so used that.

No way of knowing what files in public_HTML might be a problem but when I do it the script never ends I just get the spinning thing top right.

Status logs don't give much of a clue

The website gives this status message

Site undergoing maintenance.Site undergoing maintenance.

It would be interesting to know how to disable and see if the site loads.