Turns out the link you provided from stack overflow was spot on. The upgrade to 13.4 resolved the issue. Thanks
You are probably using free developer account. Apple blocked utilizing external frameworks on free accounts with 13.3.1 upgrade. Try downgrading to 13.3 if still possible or buy Apple Developer License.
UPDATE 04/2020: Upgrading to iOS 13.4 and XCode 11.4 currently solves this issue.