LOOHP
Can you paste your complete server startup logs for a closer look? (Just a reminder that hybrid servers are not officially supported)
Try increasing the max connections count in your SQL server.
You do it on your MYSQL server. https://stackoverflow.com/questions/22297773/how-to-increase-mysql-connectionsmax-connections
You need to also add all the command aliases such as /emsg etc.
Oh I misunderstood your question. When the message commands are not added to the CommandToParse IC Placeholders don't work properly.
Well without the libs you can't build the plugin.