Akk, lately many players claiming they cant get Essences to drop on first and second floor of Frozen Shadow. Is this just mass bad rng, or an intentional change? Or something to check? Thanks!

+1 to that

I'm camping on lv2 for the 3rd day in a row mainly hunting for v1 charm upgrades and I've not seen any essences drop - I know they're supposed to be rare, how rare I don't know - Maybe all that is required is patience

For refrence, I've farmed 4 full UC's (v1 upgrades) and seen 1 essence in the past month or so.

I would probably download the whole RoF2 client again - Start over fresh - With the symptoms you're having you could possibly be missing files, so make sure you get all 10 parts (link in the EZ-guide)

Edit : You're right - 10 files