File not found sdkconfig.h

unPhone programming
1

Compile fails with “file not found sdkconfig.h”

2

Another answer from the library docs:

If you see an error `file not found sdkconfig.h` then you're probably
  hitting [this issue](https://github.com/espressif/arduino-esp32/pull/6962)
  and need [this fix](https://github.com/espressif/arduino-esp32/pull/7330).
  (`magic.sh setup` should create the appropriate `Arduino/hardware/espressif`
  tree for you; you might need to delete the old version first.)