Hi, Win 10 version 20H2, IDE version 1.8.12
attempting to install Sparkfun ATtiny85 board
In my sketch/hardware folder I have placed the attiny folder which contains the AVR folder, which contains the boards.txt file. I reboot the IDE and load a simple sketch to blink the onboard led. When I try to verify or load the file I get the subject error message. When I try to select the board the entries contained in the boards.txt file are not there. It appears that the file is not being read.