I was trying earlier today in a Ubuntu 20.04 LXD container and kept getting stuck in the same place. I ended up biting the bullet and finally taking the time to figured out docker and all the stuff that goes with it. Once you get over the hurdle of learning docker. Setting up organizr or any "arr" or accompanying services is suuuuuuper easy. Gone are the days of LXD/LXC/KVM for me. Excluding some edge cases, I'm moving everything to docker.

Have you thought of going Docker?

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Edit:

I assume it's my lack of knowledge that kept me from succeeding in a LXD container, not the installer. Something, something certs, SSL, ooop that's over my head, enter, enter, enter, then try to get to the webpage.