Unable to Export Android App

Current Uno v1.12 works with CMake 3.6.4111459, but has the problem you’re describing when trying to build using newer CMake. From your log it looks like you’re building using a newer CMake.

To fix this you can either,

  1. Add ninja.exe to PATH. It’s included in Android CMake and the location is likely %LOCALAPPDATA%\Android\sdk\cmake\3.10.2.4988404\bin.
  2. Or, make sure you only have CMake 3.6.4111459 installed. 3.6.4111459 should be the only sub-directory found under %LOCALAPPDATA%\Android\sdk\cmake.

The upcoming Uno v1.13 will work with the new CMake version out-of-the-box, and will be released in about two weeks I think.