Unhandled exceptions while setting Z offset (Ender 5+)

[soucevit]

Hi,

I am quite new to 3D printing in general and definitely to Klipper which I just started with. Sorry for maybe newbie questions.

Little background:
I have just installed Klipper from DGUS-reloded fork on my Ender 5+ using kiauh with this repo.
Flashed latest display firmware from sister repo with it.
It is running on the old thin client style PC with i3 and 8GB RAM which I had laying arround. I think more than sufficient computing power wise.
I copied ender 5+ config template, edited the serial interface and added at the end:

[t5uid1]
firmware = dgus_reloaded

[include mainsail.cfg]

After poking around Moonraker GUI I get to start testing with the printer.
Automatic homing went fine, but Z offset is very big. In my case too big for the automatic leveling to be performed. On the second point it just timeouts on the probe. So i wanted to do manual. But again screws are too short to cover the Z offset. But the Z offset cannot be set to negative value I need in Moonraker.

Then I tried to do this in the display menu. Quite few times I got black screen SHUTDOWN and in klippy.log there is log message:
gcode.CommandError: Error evaluating 't5uid1_routine show_wait_screen:script': gcode.CommandError: bed_mesh: Unknown profile [t5uid1_mesh_backup]
Sometimes steppers sticked as enabled and either manual leveling or z offset buttons to be dead. Only way out seems to be disable them manually on the screen and try again. One time printer was completely stuck resulting in the same black screen only after while.

So my questions: Is this a bug in firmware? Am I missing something in the config?

Thanks

Vit Soucek