It looks like the game is trying to open in OpenGL but is unable to do so. It's then reverting to the ANGLE renderer which is known not to work in Sileo.
First thing to do is, assuming you're on desktop, is to update your graphics drivers to the latest version. This will hopefully fix the OpenGL issue. Failing that, try holding shift when Sileo opens. This is hit and miss, but what it should do is open a rendering menu. ANGLE seems to be hit and miss and might not work, but GL, GL2 and ANGLE2 all do. See if it works for you if you force one of those renderers.