The 14th May, 2024 Update may have put some servers on a crash loop.
This seems to occur when said servers use sourcemod plugins.

To fix this issue it is recommended to:
1 - Stop/Kill the server process
2 - Download and install the latest sourcemod build https://www.sourcemod.net/downloads.php
3 - Also download and install the latest metamod build https://www.metamodsource.net/downloads.php?branch=stable
4 - Start the server.