Hey,
Glad to hear I found the right place, finally.
This reply was very helpful – I followed the link and the instructions.
After updating all plugins, there’s no error anymore.
There’s quite a few issues I still need to go through (like paypal deciding to add its buttons on product pages and checkout carts, adding the sofort thing without asking, etc), but it’s getting there. I also still need to test the payment, ad check there’s no issues during ordering as I saw there’s quite a few reports of duplicate orders.
Fwiw it seems this specific issue is solved, so I’ll mark it as solved, thanks for your time. If I need further information or things pop up I’ll reopen it.
Regards,