Solved
STM32Cube IDE 1.13.2 "Authentication Error Manager"
If I try to log in to myST (Alt-L), I see the throbber throb for a while and then this (unhelpful) dialog pops up

So I can't download firmware.
If I try to log in to myST (Alt-L), I see the throbber throb for a while and then this (unhelpful) dialog pops up

So I can't download firmware.
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