[nostrora]

Looks like there is problem in VNC Change password, that's why authorization failed error is coming currently.
When you had changed vnc password earlier, do at that time it was working?
Tried to reinstall the OS and see if it works (reinstall and change the vnc password again and check).

No, it never worked. iv reinstalled the os many times before and tested it to see if vnc work, but it does not.
so this the problem is not on my end but theirs