That is a bug that happens to me too 
sometimes stockfish just needs a time out
There was an error classifying the move
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Nov 11, 2024
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#2
Nov 12, 2024
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#4
Happens mostly when I'm analyzing bot games. its them it's not you. How does it even know how to characterize such an error? lol It's incapable of declaring a move is interesting, unclear, or with compensation for the material.... maybe the move was one of those. Don't let it bother you, keep going, or share, copy and paste , and start over. open up to 5 lines of analysis may help too. it's not you...
For the last few weeks, when I try to analyze my games, the message "There was an error classifying the move" would often come up (see screenshot below). This happens whenever I try to analyze an alternate line that I did not play in the actual game. Sometimes Stockfish would still show the alternate lines anyway, sometimes it wouldn't.
Is there a way to resolve this? The whole point of analyzing my games is to look at alternate lines, so this is frankly quite annoying.