I'm following this after Adam helpfully sent it to me https://www.j2commerce.com/migration-from-j2store-3-to-4
I did all the unpublish parts and I renamed the folders is suggested.
I did the Akeeba magic eraser, but now I have errors on the admin and can't seem to make much progress. Some parts of the admin screen I can't see at all.
This is the error I am seeing
0 Failed opening required '/home/manicshop1square/public_html/libraries/f0f/include.php' (include_path='.:/opt/alt/php80/usr/share/pear:/opt/alt/php80/usr/share/php:/usr/share/pear:/usr/share/php')/home/manicshop1square/public_html/plugins/content/j2store/j2store.php:257
From what I can gather it's someting in the J2Store plugins, and the base ones at that. And it seems to be using f0f which is something the magic eraser will have removed right?