Error message "Invalid input, please try again"

Hello. I am fairly new to R/ am not what I would call an advanced user by any stretch. Having said that, I'm simply trying to read in my .csv, convert a couple columns to factors, build a linear model where ED depends on Body + Season + Lat, and run a stepwise AIC on this model.

I got it to work just a few minutes ago, went back to my R studio console, re-ran the exact same things without changing ANYTHING whatsoever, and now am getting the error message "Invalid input, please try again." I tried re-setting my working directory, re-installing packages, and re-running each line of code, to no avail.

PLEASE HELP! as this is for my Master's thesis and I'm on a tight schedule.

Thank you so much

Hi Kelcie, 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:

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