Error by making new Payment method after upgrade to Joomla 4

-- HikaShop version -- : 4.7.0
-- Joomla version -- : 4.2.6
-- PHP version -- : 8.0

Hi,

After updating to J4 and the newest version of Hikashop we wanted to make a new payment method (mollie / skyspyder), but when clicking the "NEW" button we are getting this beautiful red page



Hope you can help!
regards,
michiel

Hi,

What you need to do when you get an error on a Joomla website is first to activate the "debug" setting of the Joomla configuration and try again.
That usually displays an error message with more information.
Since you provided a backend access, I did it for you:
i.imgur.com/9KF4n47.png
You can see that the error points at the "platron" plugin.
That's an old plugin which was included in HikaShop years ago but is now only available on our github.
So uninstall the plugin, and delete it from the folder administrator/components/com_hikashop/extensions/ so that it won't be reinstalled automatically during updates and you won't have the issue.