Lint found a fatal error while assembling a release target

Jerg :

I was compiling my app for release and I have received an error saying this: Lint found fatal errors while assembling a release target.

<issue
    id="UnknownId"
    severity="Fatal"
    message="The id &quot;`_dynamic`&quot; is not defined anywhere."
    category="Correctness"
    priority="8"
    summary="Reference to an unknown id"
    explanation="The `@+id/` syntax refers to an existing id, or creates a new one if it has not already been defined elsewhere. However, this means that if you have a typo in your reference, or if the referred view no longer exists, you do not get a warning since the id will be created on demand. This check catches errors where you have renamed an id without updating all of the references to it."
    errorLine1="        app:layout_constraintBottom_toTopOf=&quot;@+id/_dynamic&quot;"
    errorLine2="        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~">
    <location
        file="C:\Users\Jackson\Desktop\SafetyNet\app\src\main\res\layout\activity_mock.xml"
        line="35"
        column="9"/>
</issue>

nupadhyaya :

There will be a more specific error in the logcat if you dig through it. If you can't see anything in the logcat, go to

/build/reports/lint-results-release-fatal.xml.

You will find the logs there. Post it in your question, if you still can't resolve it.