I have this issue too. The Library folder doesn’t exist. If you delete the staging folder it doesn’t affect it. The JSON is actually accessible from my location (if I point a browser at it, it downloads as a text file on screen) but if I point the IDE at it, it fails every time.
WiFi_LoRa_32_v2 JSON Config Won't Load For Arduino IDE
Please try to turn on the option to show hidden folders.
if you are the git version.Well, you really can’t find. please re-download the project.