QuestGuide
This guide contains information on creating Quests and Scenarios for Valkyrie.
This is a great place to start if you need help creating scenarios for use with Mansions of Madness. Access to a handy Table of Contents will make it easy to jump to the information that you need. MoM Creation Guide
Pressing alt+d when the log is open will show dev log entries and the variable list, which can be edited.
If you are still running into issues please provide valkyrie_Data/output_log.txt and a save game (.vSave file in %AppData%/Valkyrie/Save) of the problem and report an issue.