In case you downloaded Grimoire 3.3+ via the given One Drive link or from the Mega/Mediafire folder and got a failed to unzip archive in TWRP don't fret! It was a corrupted zip file. Bablus, the creator messed up something but now he fixed it. I've replaced the files with a good one in Mega, Mediafire and One Drive links too. Now Grimoire 3.3+ zip should work just fine in TWRP. Sorry for the inconvenience.