Suddenly Bambu Studio tells me that my login has expired!!!?
When I try to login, an empty login screen appears, and I cannot get further.
What to do? Reinstall?
I am using: Bambu_Studio_win-v02.00.03.54 and Win11
Kind regards
I solved the with help from Copilot 
I changed/selected the language to english. The field was empty!!!
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I had the same problem, but English was already the chosen language. I changed it to Deutsch so I could change it to English again. It seemed to be stuck on Deutsch for a long time and would not allow me to immediately change back to English, so I became frightened, as I know very little Deutsch. But it eventually became unstuck and allowed me to change back to English. Changing the language did eliminate the error.