That doesnt tell me much, are you using other mods? What exactly are you doing when it crashes

No, I haven't used any other mods. All I do is help the Lord with the siege, and then I attack after that crash.

If it matters, the Lord (Serpent of the Mousillon army) had already led a siege against Sigmarsheim. As I am an enemy of that clan, I decided to help out by joining the siege and attacking. Then the game crashed during the loading.

What does the crash popup say?

Nothing? It just says that it will log errors and warnings in a log file and if i like to proceed. Auto-resolve works so the problem can be in shaders or the QuickSilverEvent?

so you are your own party yes, not a hireling for someone ?

Yes, i am my own party.

hmm, and this happens during the loading screen into the battle, not during the battle ?

Nope not during the battle, when it gets to one shader it crashes.

Have you tried the workaround to clear out shaders ?

I've already done it twice, and I've even completely reinstalled the game. The strange thing is that the build shader cache works perfectly.

You didnt use console commands to cheat anything in or change anything right ?

I did add like 10k of gold, but i doubt that it did any damage.

If thats all no that didnt cause it, udid you use butr or bew to get that log details? If not we'd need a crash report from either to look into it.

EDIT FIXED: Appearently it was as simple as adjusting in-game graphics to at least medium or up.

FIXED ISSUE:
Encountering the same issue. Joined Karl Franz army as a hireling. When sieging on the campaign map, no crash. When trying to join the battle of the siege, the game crashed giving this error:
rglGPU_device::create_texture_array failed at d3d_device_->CreateTexture2D!
The parameter is incorrect
I'm on the latest version of my drivers (NVIDIA GeForce RTX 4070) and just installed the Mod and it's packages yesterday via Steam Workshop. Worked fine for about 2 hours before this particular siege. The Harmony mod version used is v2.3.6.220 from steam workshop. Mods loaded in the correct order on the launcher.
When loading the game, it won't let me load into my save game OR start a new campaign "Enter old world". It's at that moment the error above shows up. Tried fighting a custom battle and it worked fine and ran smooth. So my guess it's something to do with the campaign in particular. Additionally, when the game crashed, it seems to still be running on Steam. I have to manually "stop" it and then relaunch for the launcher to reappear. Hope this info helped R4MPZY. (Even though I've only played for a brief 2 hours, the Mod is absolutely wonderfull, what a project!)