It is either a bug with the journal or with Zixzax. Can you ask anything about the white witch? Did you go through all the conversation options?
Please email supportdos@larian.com, with a description of the problem and the report.zip file generated by the
D:OS support tool (for the PC version). The report will contain system and game information, any crash dumps, and your saved games. If file size is an issue, any saves not related to the problem can be deleted (so you would just need to keep the one after answering wrong).