I'm receiving the error below when uploading my APK to the Google Play Store. My app is built with Flash Builder 4.16.1 w/Air 29. My last published version was from two weeks ago and I've had dozens of builds uploaded with no issues, so this is new. I've updated both JAVA and my Flash Builder IDE, but it did not help.
Error: Upload failed You uploaded an APK with an invalid signature (learn more about signing). Error from apksigner: ERROR (Jar signer CERT.RSA): Failed to parse JAR signature META-INF/CERT.RSA: java.security.cert.CertificateException: Failed to parse certificate #1