Ubuntu VM with Cups Server and docker container with pycups: cups.IPPError: (1030, 'The printer or class does not exist.')

[PoKeRGT]

First of all,
Sorry if this does not really belong here but I'm a little desperate about this.

As the title says I have a Ubuntu VM with the CUPS Server and Docker.
Inside one container I have a little python flask app that uses pycups to send print requests to the outside CUPS Server.
It does not work. The error message is always

cups.IPPError: (1030, 'The printer or class does not exist.')

This same app directly run in the Ubuntu VM works perfectly.

I have a post in stackoverflow with more info:
https://stackoverflow.com/questions/77233067/ubuntu-vm-with-cups-server-and-docker-container-with-pycups-cups-ipperror-103

Please...HELP!

PD: Feel free to delete this issue, as it's only a desperate try to get more attention to my problem and I don't know where else to get help

[nkrumm]

This seems similar to the issue and fixes proposed here: #30

[zdohnal]

@PoKeRGT do the comments from #30 work for you?

[PoKeRGT]

Sorry, that project is over and working outside of the VM.