Error compiling for board Arduino Uno. (Arduino IDE 1.8.19)

[sterretje]

@aarav91

I can code now and change the settings but it only works once after I open the app,

Detecting libraries used... Error compiling for board Arduino Nano

Try this: Select File > Preferences from the Arduino IDE's menus. Click the link at the line following "More preferences can be edited directly in the file". This will open the C:\Users\Bernie\AppData\Local\Arduino15 folder (or something similar for those using another OS). Open the preferences.txt file in a text editor. Close all Arduino IDE windows. Add the following line to the preferences.txt file:compiler.cache_core=false Save the preferences.txt file. Start the Arduino IDE. Try compili…