This is a so-so horror beating a well-trodden path of hokum to nowhere.
The main actress has that permanently lost little puppy innocent face so you can see why she was cast. At first that worked -but it got irritating.
It all gets silly in the end though (no spoilers; nun here!). It passes the time, and has some shocks and gruesome scenes for those who like that sort of thing.
Make no mistake, this has B-movie or STRAIGHT TO VIDEO/DVD written all over it.
If you want to watch the classic of the same genre then watch THE OMEN (1976) which is a superb film with no flab on its 90 minutes, or I suppose the earlier THE EXORCIST.
Want priests and nuns? The found footage Irish horror film DEVIL'S DOORWAY (2018 ) is great.
2 stars; the first half maybe 3.