'Application crashes in Android 12 and S versions because of PendingIntent

I know there are multiple answers to these questions, I tried them all which were suggested in other StackOverflow posts, such as

Using FlagImmutable, I changed all of the flags of PendingIntents
used the work-manager library in my app module, the stable one
Updated FireBase But still, application crashes in Android 12 and I get the following error: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.

android kotlin

Sources

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Solution	Source