common crashes in ritual

in maps with ritual client crashes to desktop. very often, but not every map, in ritual event itself or when killing ritual specific monsters. I strongly suspect that bug is caused by certain ritual monsters. additional info: all other programs closed except Kaspersky corporate antivirus, no microtransaction on my character, maps were delirium with Huck and Einhar.

delete Content.ggpk and start client again doesn't work. packcheck while in login screen shows that content.ggpk is already corrupted

Fatal error: Your pack file has become corrupted and cannot be repaired. Currently the only way to fix this is to delete Content.ggpk and download it again by running the client.

help please