Issues generating static in MAMP

Hi

I’m having issues exporting (generating static site) now that I’ve updated Mamp to 5.3, php version is 7.3.1

When I generate in Simply Static I just get the first page and any static files I’ve manually added.

Diagnostics says:
“Checking if WordPress can make requests to itself from [ip]” “Received a 301 response. This might indicate a problem.”

When you look at the export log on the generate screen, instead of showing a url it shows a path to local files and says in the errors column “An error occurred: Attempted to fetch a remote URL”

In the apache_error.log it says

File does not exist: /Users/[web server path], referrer: localhost:8888/[site]/wp-admin/admin.php?page=simply-static

Any ideas anyone?

Thanks