After going deep, and doing in-depth analyzing, I found the issue.
In the xbase_00.iwd the plugin is spelled incorrectly.
It is spelled as sourecbansplugin.dll not as one would think it should be spelled as sourcebansplugin.dll
So it would make sense that the plugin would fail to load because in the server.cfg, I spelled it as "sourcebansplugin" which wouldn't exist because of the spelling of the plugin in the xbase_00.iwd as sourecbansplugin.dll.
After changing the spelling to what it is in the xbase_00.iwd, the plugin loaded just fine.