Open exercise system does not work (Pega Platform Foundation course)
I have just started the new course "Pega Platform Foundation (7.2)" and when I have to do the exercises, the "Open exercise system" opens a new window, but does not work. After several minutes, the next error message appear:
The proxy server received an invalid response from an upstream server.
Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request.