Deconz integration not getting websocket updates

Hey, I got a Conbee stick and I installed it in my Qnap NAS via the Deconz docker image following this guide: https://promincproductions.com/blog/add-zigbee-to-home-assistant-with-conbee-ii-and-deconz-on-qnap-ts-251/

These are the Docker vars:
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My HA is installed in a VM on the same NAS using HASS OS

The Deconz installation went well and I added a Zigbee accessory correcty. But when I try to add the Deconz integration to HA, this dialog appears:
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If I select the one that HA discovered, it throws this error
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So I follow the manual route, and I set the NAS IP where I installed it, 192.168.1.13, with the port I set when I installed the container. Now everything seems to work, HA gets the devices I added to the stick, but it doesn’t get updates of the devices states. I think it’s about the websocket, right?

But I don’t understand why the container gets a different IP address
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The URL where I’m accessing is http://192.168.1.13:9090/pwa

I’ve tried to add to the yaml file a “websocket_port” entry but I think it’s ignoring it