QuestGuide
This guide contains information on creating Quests and Scenarios for Valkyrie.
You will find most of the required information in the excellent Mansions of Madness guide (unfortunately there is no D2E guide at the moment, but most of the things are valid for D2E as well): https://docs.google.com/document/d/1Gi5gTwKkw84Px0Lvk-bJ3Aml_vF3ZoljjB6a8FjWGt8/edit#
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.