It seems like you downloaded the files you need to play the demos just delete a file that had to be downloaded it and you should be able to reproduce the problem
The file you downloaded probably have mismatched? Or the host did not have a complete matching file (0 kb? lol) for it to work? If you know where the demo is recorded at (a server or whatever) go there and get the file. Make sure you delete the 1 u have or make a back up. Then it should work. I went through this b4... so each server is different.
I can fix this problem, i take system folder of my friend...
BUT other problem, this time, with my demo in 1v1 duel server, only in this server i have this problems, in demo i see this spectrum, AND NO IS SHIELD, i can fix this? thx