What occurs if an admin installs a package with platform events into a Professional or Group Edition org?

When an admin attempts to install a package that includes platform events into a Professional or Group Edition org, the installation fails. This is due to the fact that Professional and Group Editions do not support platform events, as these editions have limitations on certain advanced features available in higher editions like Enterprise or Salesforce Unlimited. The architecture of platform events requires a feature set that is not available in the constraints of these lower tier editions. Therefore, the entire installation process cannot complete successfully when trying to introduce elements that cannot be supported by the org configuration.