Unable to play video lessons

I am unable to play any of the video lessons on any of my devices. The video just keeps buffering and nothing comes up. Other sites work fine and I have no problems using them so the problem can't be from my end. I am facing this issue only with GT. Please help.

Hello, I do have the same problem with 2 diffrent devices but only with Firefox

and Guitar Tricks so far. Edge and IOS browser do work.