Subfolder of your sketchbook is not a valid library * Please help losing hair and Brain cells

Subfolder of your sketchbook is not a valid library?? * Please help losing hair and Brain cells!

I tried everything, and cannot get Grbl installed on an Uno.

What Ive tried

  1. restarting cpu to free up stuck ports,
  2. Even tried buying a new cpu…F’ing waste of money, same issues on the new cpu…
  3. reinstalling. Please I’ve been waiting for months for this to work! please help.

Thank you again!
The first laptop is a windows 7 laptop.
and the other is new desktop win 10. WTH is going on, why isn’t this working like it used to?

Why is this so difficult?

My business has been down for two months because of this…

18 posts were merged into an existing topic: Error Compiling? Still Days later nothing works?