Hello,
Sorry for the inconvenience but as far as we are seeing the Errors in the Screenshot, they are related to some third party Payment plugin. Could you please once try deactivating all the third party Plugins on your Site. If the issue gets resolved, then reactivate them one by one to see which Plugin is causing the issue.
If somehow the issue still persists, then please provide a Video of the concern for a more better understanding and also please share your WP-ADMIN Login details too so that we can proceed further and check out the mentioned issue on your Site.
Best Regards