Error: package or namespace load failed for 'ggplot2': package 'ggplot2' was installed before R 4.0.0: please re-install it Execution halted - r

Question

I'm really stuck and need some help.
After installing R 4.0.2, I'm getting this error message on R visualizations in Power BI Desktop which were previously working
"Error: package or namespace load failed for 'ggplot2':
package 'ggplot2' was installed before R 4.0.0: please re-install it.
Execution halted"
I already tried to:
reinstall R 4.0.2
reinstall RStudio
reinstall ggplot2
reinstall all packages
reinstall Power BI Desktop. My version is August-2020
Still it does not work.
Considerations:
My visualizations were working well before I installed R 4.0.2
My visualizations are working well on other PCs
When I run the code on RStudio I don't get any error
Any thoughts?

Answer 1

You probably need to go here: https://powerbi.microsoft.com/en-us/support/, but some guesses:
When you did the reinstall, you didn't clean up the old one, so you now have a mix of old and new versions of things. If you can run R code, run
system.file(package="ggplot2")
That's where it is finding the bad version of ggplot2. Get rid of it, and reinstall. If that's not enough, run
.libPaths()
in the broken copy of R. Completely eradicate every directory mentioned there, and reinstall R and all of your contributed packages. (I don't use Power BI, so this might also require you to wipe out some part of it: do so, and reinstall it.)
After all of this, run
packageDescription("ggplot2")
In the last line (or close to it) of what gets printed, you should see something like this:
Built: R 4.0.2; ; 2020-07-16 22:49:23 UTC; unix
If you see that it was built before 4.0.2, then either you missed deleting something, or you (or Microsoft) reinstalled some old version. Then it's probably time to contact that URL above.