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Whenever you get loads of errors like this, the secret is to start with the very first reported error - most likely many (even all) of the rest will be knock-ons from it.
To do that, use the 'Console' view - not the 'Problems' list:

(the 'Problems' list unhelpfully re-orders things - so you won't know which message was actually the first)
#UseConsoleView
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