Hi Andrew,
Thanks for your reply, sorry for the delayed time answering, only today I was able to retry this. I had already tried flushing my rewrite rules through “Permalinks” by clicking “Save Changes”. But it didn’t work. This time I did it by deleting the option_value content. But I still get the 404 page, even after refreshing / force reload it.
I’m not sure what else to try. I’ve been able to update the original website, but the new one shows only the main page, all the other pages (with content) return 404 errors (although displaying the footer and the menu).
I’m pretty sure I’m doing something wrong / missing something, but I have no idea what.