404. That’s an error.
The requested URL /bookmarks/mark?op=add&bkmk=http%3A%2F%2Fwww%2Echemnitz%2Ede/chemnitz/de/kultur%2Dfreizeit/veranstaltungskalender%2Findex%2Eitl&title=Veranstaltungen%20in%20und%20um%20Chemnitz
was not found on this server. That’s all we know.