found a bug with Negi asking for help to find Lucilla, when you travel to the first location the whole screen goes black
I'm not aware of a problem with that event. Have you by chance used update files but skipped an update? In that case you might be missing the updated map file for the location where you're teleported to. If that is the issue, then you can fix it by downloading the full game again, and move the entire content of the www/save folder form the old game to the new game folder.