I was informed that the paste would be good for 6 months left in a cool, dark area but was unsure about freezing. Is it okay to freeze ayahuasca paste?

You may want to delete the bit of your post about where you got it from as it's against the forum rules.

There should be no need to freeze your paste. It should keep in the fridge for years. Possibly even decades.
I don't even refrigerate my pastes, I store them at room temperature. At such high concentrations, the brew is very resistant to pathogens.