ckapaun

Just upgraded to CURA 4.9.0 from 4.8.0. 4.8.0 was working fine, 4.9.0 install completed without error. After starting 4.9.0 CURA loading proceeds normally and eventually a white window opens with no content and closes after a couple seconds. stderr.log contains the following: 2021-04-21 16:52:35,711 - DEBUG - [MainThread] UM.View.GL.ShaderProgram.load [58]: Loading shader file [C:\Program Files\Ultimaker Cura 4.9.0\resources\shaders\striped.shader]... Fatal Python error: Aborted Thread 0x000004dc (most recent call first): File "C:\Program Files\Ultimaker Cura 4.9.0\plugins\USBPrinting\USBPrinterOutputDeviceManager.py", line 87 in _updateThread File "threading.py", line 870 in run File "threading.py", line 932 in _bootstrap_inner File "threading.py", line 890 in _bootstrap Windows 10.0.19042 Build 19042, Ultimaker S3 firmware 6.3.0. Any ideas on root cause and workarounds appreciated. cura.log stderr.log