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.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…