You uploaded an APK or Android App Bundle that was signed in debug mode. You need to sign your APK or Android App Bundle in release mode. Learn more about signing.
Warning:
This APK results in unused code and resources being sent to users. Your app could be smaller if you used the Android App Bundle. By not optimizing your app for device configurations, your app is larger to download and install on users' devices than it needs to be. Larger apps see lower install success rates and take up storage on users' devices.
Resolution:
Use the Android App Bundle to automatically optimize for device configurations, or manage it yourself with multiple APKs.
Is there not any way to work with Droid Script and upload APK to play store directly ? without any other tools involvement ?
Unfortunately Google will keep pushing them because they make developers even more dependent on Google.
There is no other way to upload any apk (DroidScript or otherwise) to Google Play than the Google Play Console
You just need to plough through all the requirements.
It is often just a required image that hasn't been added