Persistent Crash: "Ascendant_Portal/effects/wisp_smoke_base.dds: Failed to uncompress texture file"

Hi,

I am getting this crash every time I start up Path of Exile: https://i.imgur.com/pgrnt3P.png

Sometimes it happens in the login screen, sometimes in the character selection scree, sometimes I load into a character and even have time to change zones, but every time, it crashes within <30 seconds of starting up the game.

This was not happening 2 hours ago, and I changed nothing in the settings or install files.

P.S. I am using the standalone client.

Update: I ran packcheck.exe (found in the main PoE folder) and it fixed it pretty quickly.