The errors in the log notify you of the absence of Opacity and Emissive channel in your project. Make sure to use a Shader that allows these maps, and to add the Opacity and Emissive channel in the texture set settings.
If this don't solve the issue, would you mind sending more info and visual on the project? any additional information is welcome.
Best regards,
Cyril Dellenbach (Micro) | QA Support Artist | Adobe