Please help: Error occurred while checking for updates.Unable to establish connection with R session Rstudio

I am a relatively new R user and for some reason keep getting the above message every time I try to launch RStudio. I have successfully used RStudio in the past few months with no issues.

I am unable to do anything in R and am not able to open my preferences or anything.

I am using a Macbook Pro. I have tried removing and reinstalling both R and R studio as well as updating my Mac.

I am taking a course tomorrow that uses R and desperately need to get this resolved before tomorrow.

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