I have seen that the fix for
“This device cannot handle more conversations” on the P1S was simply to restart the printer, but that did not work for me.
In my case, I was running several instances of BambuStudio on 2 different computers.
The basement computer threw the “This device cannot handle more conversations” error and was stuck.
After trying every other fix, I finally went upstairs, closed out 3 instances of BambuStudio on that computer, restarted the printer and then the downstairs computer connected without the error.
The PS1 apparently cannot handle multiple connections to many instances of BambuStudio.