Error message in uploading file

Error message when attempting to import a file into RStudio:
"Error: namespace 'rlang' 1.0.4 is already loaded, but >=1.0.6 is needed"
What do I need to do?

The message is telling you that you need to update the rlang package.
Restart R and RStudio and do:

install.packages("rlang")
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