I am getting the same errors when trying to pull uptime-kuma container.
[cont] error response getting manifests:404
was unable to import, container 7488cd1c-7ee6-49d0-9c36-91353e2c4131
This is my first attempt at installing containers
Network environment is built (bridge, veth interface, ip address, port, etc.
V7.18.2
most of the reports of this error were in 2023 on V7.9/7.10 so it must be something else I am not doing correctly.
I had the same issue trying to pull a postgres image, after adding "library/" to the remote-image it worked (tested on v7.18.2 and v7.20rc2 on my RB5009)