QOpenGLShader::link: D3D compiler module not found.

I have a QML/C++ app which works on Android, but in Windows There's only blank (white) screen and the Application Output panel shows (EXECUTE APP is my own debug just before app->exec()):

unknown 0: EXECUTE APP

unknown 0: QOpenGLShader::link: D3D compiler module not found.

unknown 0: shader compilation failed:

"D3D compiler module not found.\n"

unknown 0: QOpenGLShader::link: D3D compiler module not found.

D3D compiler module not found.

unknown 0: QOpenGLShaderProgram::uniformLocation(matrix): shader program is not linked

unknown 0: QOpenGLShaderProgram::uniformLocation(opacity): shader program is not linked

unknown 0: QOpenGLShader::link: D3D compiler module not found.

etc.

The same app works with 5.11.2 and in Android with 5.12b3.