Can someone tell me why this will not compile?

Thanks,
Wayne M
Then I changed the file to RTC_ESP32n.fcfx.Running cmake in directory c:\users\kfs-forschung\downloads\rtc_esp32_(1)\build
Executing "cmake -G Ninja -DPYTHON_DEPS_CHECKED=1 -DESP_PLATFORM=1 -DIDF_TARGET=esp32 -DCCACHE_ENABLE=1 c:\users\kfs-forschung\downloads\rtc_esp32_(1)"...
Build Failed