Unreal Engine 5.5.1 crash

Got some troubles with geometrical operation (extrusion), every other transformations work normally but when i try to add extrusion - UE crashes.
OS: Win 11
Error: D:\build++UE5\Sync\Engine\Plugins\Editor\GeometryMode\Source\GeometryMode\Private\EditorGeometry.cpp [Line: 400]

Hi there @Cr4ftYr1

Welcome to the Unreal Engine Forum! Can you upload the text for the full crash log? (The text file) I’d be happy to take a look!

Sorry i cant upload attaches right now, because Im a new user. But here is latest warnings right after i switch modes

[2024.12.27-12.02.38:257][302]Cmd: BRUSH ADD SELECTNEWBRUSH
[2024.12.27-12.02.46:174][591]LogStreaming: Display: FlushAsyncLoading(481): 1 QueuedPackages, 0 AsyncPackages
[2024.12.27-12.02.52:439][878]LogSlate: Took 0.000202 seconds to synchronously load lazily loaded font ‘…/…/…/Engine/Content/Slate/Fonts/Roboto-Regular.ttf’ (155K)
[2024.12.27-12.02.56:468][983]LogSlate: Window ‘Warning about coordinate extrusion mode’ being destroyed
[2024.12.27-12.02.58:727][ 75]LogGeometryMode: Warning: Unable to find 1 Poly(s) in new BSP
[2024.12.27-12.02.58:727][ 75]LogGeometryMode: Warning: Unable to resolve Brush_1 Brush in new BSP, see above
[2024.12.27-12.02.58:727][ 75]LogGeometryMode: Warning: Unable to find all previously selected geometry data, resetting selection
[2024.12.27-12.02.58:727][ 75]LogOutputDevice: Warning:

Script Stack (0 frames) :

[2024.12.27-12.02.58:784][ 75]LogWindows: Error: appError called: Assertion failed: 0 [File:D:\build++UE5\Sync\Engine\Plugins\Editor\GeometryMode\Source\GeometryMode\Private\EditorGeometry.cpp] [Line: 400]

Have you pulled everything over to a new project and tried testing it after rebuilding, by chance? (Also, does this happen on any other UE version?)

No, it crashes all time (rebuilding changes nothing), but UE 4.27.2 works stable

Hm. What are your system specs?

Windows 11 pro x64
Ryzen 5 1600 (6-core 3.2 Ghz)
GTX 1650 OC
16 gb (8X2) 3200 mhz each
ssd m2 (win dir)
hdd 1 tb

@FrostyJas here is latest UE 5.5.1 crash log. I can finally upload it)

Test1.log (144.2 KB)

If you haven’t yet, I’d recommend deleting your saved, intermediate, and binaries folders and try rebuilding to see if it goes away.

I seem to face the exact same issue as mentioned above, with an identical log file. 4.2 seems to work for me as well. I deleted everything related to UE/Epic and a fresh install does not resolve the issue on my end.