Hello, Today I downloaded the offline version of MDN for HTML from Kapeli. I extracted it and ran it with Firefox but error appeared, it was saying: "'''Application rendering error. An unhandled error occurred in the application. We apologize for the inconvenience!'''" after that I opened it with Edge and everything was working just fine. I tried to reset Firefox, but this didn't work either. Can you help me with this problem, I would be grateful.