Since August 1st in the UK you get the Error shown below on uploading an apk
Latest Error using build 292.11 with 29 and 9 target
This release is not compliant with the Google Play 64-bit requirement
The following APKs or App Bundles are available to 64-bit devices, but they only have 32-bit native code: 5.
Include 64-bit and 32-bit native code in your app. Use the Android App Bundle publishing format to automatically ensure that each device architecture receives only the native code it needs.
I can build an app bundle but get stuck with the Google App signing. Is there an 'idiots guide' on how to produce and submit signing keys/certificates ?