Error: Bed Leveling on

Hello, I now have a bed levelling problem after I did the update, but everything from the beginning: I bought it at the beginning of December and received it. Then I calibrated it and it worked fine. Then I found out that there was a Simple Track 01-10b-DE update. I wanted to update it because of the language, as German is easier for me. Then I wanted to install this update, but it didn’t work (image no. 1), so I reinstalled the English version, which also worked with the firmware. But now I have this bed levelling error when I go into the settings or want to upload a file (nr2) , and the THC function can no longer be turned on and off. I have recalibrated the device several times and reset the factory settings. Please help. I hope someone can help me because I am actually very impressed with the device.Thank you in advance for any replies.

NR1

nr2

Best regards from Luxembourg