It could be that there are some low-level DSOs included in the distributed MG-LicenceConnector package.
It will help if you rename/move these DSOs out of the libs dir, e.g., librt.so.1, libpthread.so.0, etc, until the error is gone. As long as the connector launches, it will work just fine.
The new version of connectors, with HTTPS support, may be available soon. Rocky 9 will be on the test list before it is published.