I think that the probelm is connected with the order submission that is very slow (it takes about 2 minutes to get to the end). I'm triyng to fix the issue but I can't sort it out.
Analytics data is sent when a customer reaches the order confirmation page so order processing time should not affect it. It seems the fact that you cannot open add-on settings page is related to the initial issue. Please try re-installing the add-on.
Talking of trouble shooting , do you know how to activate the php and mysql logging in cs-cart ?
You can enable the development and error reporting modes in order to see errors and warnings in CS-Cart. Open the config.local.php file and add the following code to the end of the file: