CoC suddenly stopped working. Says no supported skill

Was working fine, i didnt change any weapon set passives. I have tried making sure weapon set 1 and 2 are checked on for all skill gems to do with CoC. I have even respecced the points that were set to weapon sets to no avail.

.....heeeeelp

I had this same issue too and I had to make a new CoC gem. There was a previous patch note from a fix last league that fixed some blasphemy gems that were broken, so maybe that bug is happening again.