1. Update your system (windows, graphics, bios, etc.)

2. Change the properties of "LEGOLCUR_DX11.exe" in the game directory to disable fullscreen optimizations, run in compatibility mode (windows 7 or 8), and run the program as administrator.

3. Disconnect controllers (temporarily)

4. Install the specialK mod fix for the game along with the special archive file

Credit (I didn't create these, just found how to modify them to make my game work):
LEGO City Recovered
A Guide for LEGO® City Undercover
By: Kaldaien
Framerate Fixes and Fullscreen Exclusive Mode for this sloppy game.
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=949406574&searchtext=lego+city+recovered

direct download link: https://gitlab.com/Kaldaien/SpecialK/-/tags/lcr_limiter (click release "lcr_limiter" and then scroll down and click the LCR2.7z file to download it; drag and drop contents in to the Lego City Undercover game main directory which can be found through steam)

special archive file: https://discourse.differentk.fyi/t/download-special-k/1461 (download the archive version, take out the specialk64.dll file out and rename it to dxgi (the final file name should go from specialk64.dll to dxgi.dll) and place this file into the game main directory to replace the old dxgi.dll found in the original specialk mod

edit the dxgi CONFIG file aka dxgi.ini (I used notepad), and replace second section titled [SpecialK.System] with the following:
ShowEULA=true
InitDelay=250
Silent=true
LogLevel=0
IgnoreRTSSHookDelay=false
UseCrashHandler=true
GameOutput=true
EnableCEGUI=true
SafeInitCEGUI=true
TraceLoadLibrary=true
StrictCompliant=false
Version=24.10.5
EnableCrashSuppression=true
NoCrashSound=true
WaitForDebugger=false
GlobalInjectDelay=0.0
ReturnToSKIF=false
AutoLoadASIFiles=false
save the file with the edits

5. run the game normally, the fix should prevent crashes

6. Reconnect your controllers if the crashing stopped

note: if the game still crashes: Set in-game video + effects settings to minimum. Lower your in-game resolution. (you can set them back to normal after the crashing is fixed

comment if ya got problems