When opening the front door, The Up Box+ cannot proceed auto-leveling

That maybe the CPU problems, You can try to rescue the CPU to solve the issue.

Here is the guide on how to rescue the CPU.

Note:The exe format file is named Cetu CPU Utility, But it also can be used for Box+ Cpu rescue.

https://support.tiertime.com/hc/en-us/articles/360002565893-CPU-Rescue.

If the issue can not be solved by rescue the CPU, Then maybe the CPU need to be replaced.