In my case, the library at fault was 'UIPEthernet'Hope that helps someone.Steve.
Hi,I Have the same problem with PWM library --> "PWM version unknown INSTALLED"i installed the library correctly from the following link:https://code.google.com/archive/p/arduino-pwm-frequency-library/downloadsis it possible that it is related to the IDE version? I'm using the newest Arduino 1.8.1what could i do to solve it?Tanks,Lior
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