Error message: use of NULL environment is defunct

I still have lots to learn especially on debugs, rlang, and tidy expression...

I cant make a heads or tail of an error msg :

Error: Problem with mutate() input ..1.
i ..1 = across(...).
x use of NULL environment is defunct

I suspect input plugged into across() is returning NULL but I cannot be sure... Please help!!

Hi, welcome!

We don't really have enough info to help you out. Could you ask this with a minimal REPRoducible EXample (reprex)? A reprex makes it much easier for others to understand your issue and figure out how to help.

If you've never heard of a reprex before, you might want to start by reading this FAQ:

Thank you!! A great advice. I should have been a bit more courteous than just pasting up an error msg.
My apology to the community!!

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