Hi @X2Studios, @jacobbullock & @iLovePorkDumpling,
Thanks for reaching out to us about this! The error missing required architecture i386 is specific to app simulators and will prevent you from being able to test on a simulator.
To investigate the issue further, we have built a sample project using Fabric and tested the build on iPhone 4s and 5 simulators. Unfortunately, we were not able to replicate the issue you have described in our various tests.
It sounds like we’ll need more information in order to understand any setup-specific issues that are creating this error. If you are still having trouble, can you please reach out to the MoPub Support Team at support@mopub.com with the details of the issue? Feel free to reference this forum post in your email to the Support Team.
Thanks!