After recent update Fedora Silverblue 42 on 2025-09-24 I got this error:
rpm-ostree: symbol lookup error: rpm-ostree: undefined symbol: repo_add_deltainfoxml, version solv_1.0
Since rpm-ostree is not working there is no chance in normal way to rollback or try to update.
Any hint appreciated.
Hello @rhodiak and welcome to 
!
You can boot your previous working deployment from the GRUB menu and pin it so it doesn’t get automatically deleted. Later, when you have a working update, you can unpin it so it doesn’t take up space.
I did it already, but the rpm-ostree error is still the same in both deployments - I have only two of them. That is way I asked forum since it is very strange to me. Also my theme (solid black color) and dash-to-panel extension were completely changed (dash-to-panel extension was upgraded to newer version). My gnome-shell is 48.4
What is the exact command that causes this error message?
Just rpm-ostree without or with any parameters.
However, today I saw in Software that there are System updates available, so I hit the Download&Restart and it worked somehow this way - after the restart no more updates available but rpm-ostree command in terminal still gives an error described earlier.
Can you look at the logs for rpm-ostreed.service in the journal?
Can you make sure that your environment is clean when running the rpm-ostree status command?
Thank you for the hints - problem solved. My environment was not clean and once I fix this now rpm-ostree is working properly. Case closed, imo.