SOLUTION: You uploaded an APK with an invalid signature - digest

So I have had a couple of clients contact me with recent issues with publishing and updating Google play apps.
So I have had a couple of clients contact me with recent issues with publishing and updating Google play apps. It seems there are issues with some older .keystore certs and apps and google are no longer allowing you to update the app (or sign new ones) using the algorithm SHA-256. From my research, it looks like its caused…

Calaméo - Pro Android web apps

jarsigner: java.lang.SecurityException:SHA1 digest error for META-INF/CERT.RSA android error while updating application - Stack Overflow

You uploaded an APK with an invalid signature error when uploading unsigned APK to Play Store · Issue #961 · pwa-builder/PWABuilder · GitHub

Phonegap APK - jarsigner -verify throwing an error - invalid SHA-256 signature file digest for res/layout/notification_action.xml · Issue #903 · apache/cordova-android · GitHub

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You uploaded an APK with an invalid signature in Google Play Console

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