Omeka S csv import Past Imports page not loading

I’m trying to check on the status of a csv import which is taking hours (150k items) but it’s not working and when I try to look at the status or past imports I get the following page, as if not all of the page has loaded. Can any one help?

Yeah, that looks like there’s some sort of error happening when rendering the Past Imports page.

A PHP error was probably logged here, so you could look in your PHP or Apache logs for it. Alternatively, you can try the Display Error Details instructions.

Many thanks @jflatnes! I now know what the problem is, but I’ll create a new post for that.