my friend changed into a crashing avatar and cant change since they are have a meta account and are in handtracking, is there any ways to help them
By hand tracking, I guess you mean they don’t have the controllers any more?
Sounds like you already read https://help.vrchat.com/hc/en-us/articles/360060847634-Unable-to-switch-out-of-an-avatar
If they still have the controllers:
If the above option doesn’t work or you’re unable to load into a world to reset your avatar for any reason, hold down both the Quick Menu buttons for the duration of loading a world and your avatar will be reset upon load-in.
Otherwise you’re left with waiting for the avatar to get removed, or contacting support?