Hello.. Jumping from the SkyX forums to here.. I am having the same issue with TSX on RPI4 (8GB) running Bullseye 64 bit (and 64 bit TSX as well). ZWO EFW is recognized by system on startup (FW centers) and works with Indigo driver but will not work with X2 driver for TSX. EFW shows "Ready" but that's it. Nothing else works. I understand that there are issues with some cameras and focusers as well. Please help.. EFW Driver Version 2.00, EFW SDK V1,1,0.1. It will randomly also throw an error code 200. Additionally, my 2600 won't connect to TSX (but is recognized) and TSX just blows up. My 1600 works but same issue with EFW. Please help, it seems these issues with X2 Plugin have been ongoing.