Cześć @rdslw,
I am not sure of exact issue but my rough guess is that distribution which you have downloaded attempts to download things from wrong repo or something.
However, before we get into troubleshooting - the first 2.5.0 distro release had some troubles and been fixed. Check if you have 2.5.1-2 package available: openHAB 2.5.x Patch Releases
Please be aware that there are some configuration changes between 2.4 and 2.5. The restdocs been moved from misc to ui category. If you reuse it, then you will experience jo-jo effect with things being installed and uninstalled.
Cheers,
Łukasz