The problem seems to be that the web fonts URL is not using https. I also found that in your file is that there is a clickTag script. The ClickTag script is not needed if the creative is created using GWD. So I have fixed the web fonts URL issue and also removed the ClickTag script from your file.
Would you please take a look at the attached file and try publish to Studio again?
Thanks,
Emily (GWD Team)