Since I updated to TwitterKit 3.0.4 I started receiving the following error once I try to upload my app to iTunes Connect.
[Transporter Error Output]: ERROR ITMS-90535: "Unexpected CFBundleExecutable Key. The bundle at 'Payload/Eventelis.app/TwitterShareExtensionUIResources.bundle' does not contain a bundle executable. If this bundle intentionally does not contain an executable, consider removing the CFBundleExecutable key from its Info.plist and using a CFBundlePackageType of BNDL. If this bundle is part of a third-party framework, consider contacting the developer of the framework for an update to address this issue."
Update: Update to TwitterKit 3.1.0 solves the issue.