I was a victim of a windows bad module info error and fatal errors after 2.5. After some extensive searching and pleading on forums there is no answer to the solution, but here is what I did and the game started working again. If you dont use mods, I suggest still following the uninstall and reinstall steps.
I know several people are still having problems after the 2.5 patch. This is what I had to do which I believe fixed the issue because I tried everything else.
First, you will need to unsub from all mods.
After doing this you will need to go into:
Steam > steamapps > common > workshop > content > 440900
In the 440900 folder you will need to delete every folder.
Next:
Completely uninstall Conan Exiles
Next:
Especially if you have an NVIDIA graphics card - completely uninstall your graphics card drivers and re install them.
Next:
After re installing graphics drivers, re install Conan Exiles
Next: Log into the server and let the server install the mods
I know in my case update 2.5 did not agree with the graphics drivers for NVIDIA until after I did all this. I know its a pain, but try it and see if it works. Since I did all that I havent had any issues.