Objects in the scene disappeared ios

Hi
I’m working on an ios game and i have already compiled this game for ios many times and it worked fine, but suddenly , after a build , The the objects in the scene are disappeared and only gui obgjects were visible,how is it possible?
Update: could this be the problem?
Xcode
WARNING: Shader Unsupported: ‘Standard’ - Pass ‘FORWARD’ has no vertex shader
WARNING: Shader Unsupported: ‘Standard’ - Pass ‘FORWARD_DELTA’ has no vertex shader
WARNING: Shader Unsupported: ‘Standard’ - Pass ‘SHADOWCASTER’ has no vertex shader
WARNING: Shader Unsupported: ‘Standard’ - All passes removed

Clearly your OS does not support the shader you are using, or your shader is missing the vertex function.
You might want to see if your shader has the components defined here.