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 192.168.178.100 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
Jan