Radek
Radek
When did the error appear? After the upgrade?
There is a problem with the motor controllers. Send a response to the M122 command
Check if there are pins for the UART mod under the motor controllers. 
Check if the motor controllers have a surge for UART mod. 
Close the ticket if you have solved the problem. Thank you
https://github.com/bigtreetech/BIGTREETECH-TouchScreenFirmware/issues/2811
This is a known issue that users are notified about here https://github.com/bigtreetech/BIGTREETECH-TouchScreenFirmware/issues/1047
The FW for these two screens is almost identical. The only difference is in the LED under the knob
You will need to adjust the display cable connection. Look for inspiration here. https://github.com/bigtreetech/BIGTREETECH-SKR-E3-Turbo/issues/40