Same thing happened to my X1. I reset it to factory settings and then did the upgrade and everything worked again.
So many of these darn “Can’t connect” or “Network error after update” threads…
I just had the same problem today, except I have not updated my printer since March, or even used my printer for over a month, and I could not get BS or the Handy App to see the printer, which passed all network tests. So it might be a Bambu Handy App issue after update that nobody has noticed that is causing this, and are blaming the printer firmware or BS software.
Here is what I did - Started from scratch on the printer “Scan qr code with phone and Handy app” then ultimately rebind my printer with the app. Then all my issues went away - even BS could not see it until I did that.
Hopefully this helps some of you out.
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