Expose port for inter-container communication - Port is already in use

Apps and Virtualization
1

Hi,
I was trying to install ntfy with the following setting with port 80 and “Expose port for inter-container communication”

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image1218×742 17 KB

For my understanding this should result in just opening the port on the container itself - that is the same I did with docker-compose for the same app.

Unfortunately I got the following error:

middlewared.service_exception.ValidationErrors: [EINVAL] app_create.network.http_port.port_number: Port is already in use.

I have other apps/container that publish also port 80 - but this should not interfere in any way.

Any idea why this is happening and how to solve this?

Thanks in advance!

2

Known bug with a fix in the making

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