Invalid Signature App Store


I have uploaded a Xojo made app to the app store with success and am waiting for Apple to review. While uploading the binary, I received an error and a few warnings, such as related to invalid signatures regarding RBAppearancePak.rbx_0.dylib, for instance. I corrected the error and was able to upload the app with Application Loader. However, I could not do anything to remove the warnings. Is there a reason why I get those warnings, and is there a way to remove them?