I was having the same issue. I am not sure if this is really the correct thing to do since I am a beginner but I re-instaelled opensuse and it seemed to correct the problem. In the process of trouble shooting if I turned off all repositories except for the Installation DVD the internal error would go away.
Sometimes when I’m in the middle of downloading packages, it just seems to lose connection. I abort, reopen YaST/Install Software, and then it works fine the next time.
Also, one I ran into an issue where I started to download packages, and a few minutes later new versions were put on the repositories. So it wanted to download version x.y.z, and that file no longer existed but x.y.z.2 did. Again, backing out and then reopening YaST/Install Software fixed that as well.
OK it was “Driver” error IF I had taken time to understand the error message (Can’t provide file ‘./suse/noarch/bundle-lang-gnome-cs-11.0-149.1.noarch.rpm’ from repository ‘openSUSE-DVD 11.0’) I would have realised the clue was in the last few characters.
All I needed to do to fix the problem, was to put in the SUSE V11 DVD!!! not sure why it didn’t just say “Insert the openSUSE-DVD 11.0” but I fixed it in the end!