7e7a90f28649e8be78c0b77efb404dd2a62f157f started using ReflectionClassConstant::IS_PUBLIC in Rector\Core\DependencyInjection\Collector\ConfigureCallValuesCollector which is not available prior to PHP 8.0.
This leads to the following error when running rector on PHP 7.4:
[ERROR] Undefined class constant 'IS_PUBLIC'