Mosquitto Addon: Outgoing messages are being dropped for client

Hello everybody,

I currently have a small problem with my Mosquitto broker addon.
As soon as I connect my instar camera, I get the following message:

New client connected from as front yard (p2, c1, k60, u’admin ').
Outgoing messages are being dropped for client front yard.

It is not possible to control the camera.

After a long google search, the command “max_queued_messages 0” should be added to the configuration. Unfortunately, this does not help.

"The maximum number of QoS 1 or 2 messages to hold in the queue (per client) above those messages that are currently in flight. Defaults to 100. Set to 0 for no maximum (not recommended). See also the queue_qos0_messages and max_queued_bytes options . Reloaded on reload signal. "

Does anybody have a solution?

Thanks and best regards