On another forum, a kind person posted this solution which seems to work. Now I need to find some documentation on how to use this. :) I think you installed the new library in the wrong place. Remove it from the library folder where you have installed it. Now check that ESP32 can start correctly. If...

In the arduino IDE, I am trying to install a library to drive WS1812B type LED'S. I've tried 2 different libraries and both get the same error. WARNING: Error loading hardware folder C:\ .... \Arduino\hardware\espressif No valid hardware definitions found in folder espressif. I re-installed the espr...