FX files not loading

Either if i try from menu or drag in any fx file i get this error

also diasppearing from some patches

uhm…you say this is on a clean startup of beta21? can’t think of anything causing this atm… you’re not on bootcamp or such stuff, are you?

its standard xp sp3 on pc, tried uninstall and reinstall v4, no difference, it used to work ok till couple weeks ago.
sometimes when i open a shaders helppatch it starts working but then again breaks