I have been trying to upload the strand test into my arduino uno and I always get a message at the bottom which reads "Invalid library found in C:\Program Files (x86)\Arduino\libraries\ws2811: C:\Program Files (x86)\Arduino\libraries\ws2811"
What am I doing wrong?
Looks like you have an invalid library
Look at the example that came with your library which perhaps you didn't download.
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Delete C:\Program Files (x86)\Arduino\libraries\ws2811 (copy it somewhere, just in case)
Get library from adafruit, put it in your libraries directory.
The invalid library is only a warning message. Does it stop the code actually uploading? My library folder is chocked full of old stuff and I get that message all the time and it doesn't stop the code uploading.