There's little to really say about this poverty-stricken lump of nothing, except that everyone involved needs to be quietly dissuaded from ever doing anything like this again, possibly augmented by the mother of all slaps. Technically indifferent to a level far below competent, let alone professional, let alone vaguely interesting, cataclysmically nay catatonically dull, and very poorly acted (performances are barely on the level of "stand there and say this"), it makes no sense, has no scares, has no laughs, and occasionally wanders off into irrelevant scenes that feel like they were pasted in from another, equally terrible, project entirely.
Him kicks off with a businessman who sold his soul to the devil in return for success in the warehousing business, because Satan presumably needed some storage space, but he loses everything when he refuses to sacrifice a virgin. Years later his abandoned warehouse is believed to be haunted, and half a dozen imbeciles decide to spend the night there looking for paranormal activity, even though they hadn't bothered to bring cameras, monitors or recorders (strangely, this is one cheapo wandering-around-in-the-dark exercise that would actually be better as a found footage film). Satan manifests as a clown and a disfigured little girl, because he's clearly got nothing better to do these days than hang around an empty warehouse in the middle of the night scaring dullards with creepy dolls.
When a film isn't the best morons-in-a-warehouse horror film of the week and the only other morons-in-a-warehouse horror film of the week is the underachieving Sweatshop, it's probably time to stop. At the very least, it's time to stop clicking the Watch Now button on every morons-in-a-warehouse horror film that seeps onto the streaming services. Dross.