Starting Octoprint on PC causes Prusa to restart

What is the problem?

I had Octoprint running for months with no issues. I had to switch Raspberry's - I was on a B3+, now it's on a B3. I reinstalled Octoprint on a new SD. No other changes. When I start Octoprint on my PC, the Prusa i3 MK3S+ restarts. I see this for State on the PC:
State: Offline after error
No more candidates to test, and no working port/baudrate combination detected.

What did you already try to solve it?

It's a clean install with no plugins yetso I don't know what to check.

Have you tried running in safe mode?

not sure how.

Did running in safe mode solve the problem?

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Systeminfo Bundle

You can download this in OctoPrint's System Information dialog ... no bundle, no support!)

WRITE HERE

Additional information about your setup

OctoPrint version=the latest, OctoPi version=the latest, printer=Prusa i3 MK3S+, firmware=DK, browser=firefox, operating system=Win10,

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you mean when you open the webinterface, right?

well we don't really know what happened because you didn't include a systeminfo bundle :wink:

Just to make sure that I have understood everything correctly: the pi was connected to the printer and as soon as you opened the webinterface it disconnected, the printer restarted and you got offline after error, right?

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