Mupen64+ flickering

Hiya. I followed the procedures given by the user Javilinface and was able to run N64 games using mupen64+. However the screen flickering is really bad in most of the games. It doesn’t really appear in Banjo Kazooie from what I can tell, but it’s in the Zelda games, Mario 64, and Buck Bumble.

You can see it here:

Any ideas for fixing this?