This was working fine up until recently when accidentally tried to install a version of the extension which wasn't compatible with 3.0.3.3, but when I tried to revert back to the correct version i'm now unable to complete the checkout journey. I can see `Your seller account has been connected` and can see the client ID, secret, and merchant ID. When I try to check out with a basket of items by hitting the yellow "Paypal" button, a small paypal window opens, I see the normal paypal loading spinner, and the window immediately closes and I remain at the opencart basket page.
I haven't been able to find any logs that would help me dig into this. I've removed and reinstalled the plugin, and don't have any other extensions installed.
The URL of the shop is https://rullorchard.co.uk/rull_shop/
Would someone please have any ideas what the issue might be, before I have to revert back to accepting cheques as payment?
Thanks so much!
