What this error means
A library the app needs wasn’t found in the configured repositories — a wrong version, a missing repository, or a network blip on the runner.
Why it happens
Gradle could not download a library named on the “Could not find” line. The version does not exist, a repository is missing, or the runner could not reach it.
The message tools print
Could not resolve all files for configuration ':app:releaseRuntimeClasspath'.
> Could not find com.google.firebase:firebase-messaging:.How to fix it
- Read the “Could not find” line: it names the library and version.
- Check that your plugin versions match your Capacitor major.
- Re-run the job if it was a network hiccup.
Check a log that shows this
Paste the failing step into the build error explainer. It matches this message, and any others in the same log, in your browser. Nothing is uploaded.