I'm having my first metting with the fanatic, but when I have to "click" to start the dungeon a lot of "could not load XXX file" messages appear and then the game crashes. I tryed to delete every folder I found and the "fix/repair" option from gog galaxy but nothing works.
Can someone help me please?

Have you checked your disk/memory for errors?

do you mean my hardware? how do I do that?
Also I have been playing for an hour at the first time the error occurred

Yes, hardware.

The most basic thing in time of some troubles is to check S.M.A.R.T. - you can use, for example, CrystalDiskInfo to do that.

I'm attaching a picture of cystaldiskinfo, what do I do with that now? I'm tottally lost

It looks like SMART is ok.

Have you tried to uninstall the game and install it without Galaxy? Remember to backup your saves first.

Just tried that, same history :(

Edit: I tried to create a new game and no error occurred. Could it be that my savegame is broken?

Have you re-downloaded game files? Maybe this setup got corrupted somehow.

Also, maybe your save got corrupted.

Could you do the screenshot of message window with this error?

yes, I re-donwloaded the setup files.
I'm attaching the error. Somehow I am not able to use impr print button, so I used my cellphone

It looks weird, I've never seen anything similar. Do you have any mods installed?

Nothing, only official DLCs.