Currently, when using the analysis parameter sonar.branch.name on a Community Edition, the error message is the following:
To use the property "sonar.branch.name", the branch plugin is required but not installed. See the documentation of branch support: https://redirect.sonarsource.com/doc/branches.html
The branch plugin doesn't exist anymore.
We could say:
To use the property 'sonar.branch.name' and analyze branches, Developer Edition or above is required. See https://redirect.sonarsource.com/editions/developer.html for more information.