Mosquitto disconnects when I send data with mqtt

Hi, I had everything working well for a week, then suddenly when I try to send MQTT data to Node-RED, it disconnects from mosquitto. When the transmission is over, it re-connects. I am using port 2110 for mosquitto running as a daemon, and it worked fine until today. Any ideas?

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So it turns out to be the ClientID that makes it disconnect from Mosquitto, so I am wondering if anyone know how to make a proper mosquitto.conf file?

I have tried all kinds of rule combinations, but I cannot seem to get it to accept the Client ID. I don’t want a username or pwd because the data stream isn’t of any consequence; the Client ID will be enough.

Tks, AB