I have been downloading sketches and code. The problem is every time I try to add the library, I get the following error message. Specified folder/zip file does not contain a valid library. I even tried to copy the folder to send here, but I get the error message each time. I have tried this with several folders all fail. I am at the point of total frustration.
Please post links to where you downloaded the libraries from. Use the chain links icon on the toolbar to make them clickable.
A screen shot of the folder where you installed the libraries, and the contents of one of the library folders would be in order, too.