PlantUML diagrams for Confluence creates Confluence space where it stores the configuration.
The add-on will create “PlantUML Configuration Space“ with a single page - “PlantUML Settings page”. That page has one attachment containing important settings in JSON format. Please do not delete this file.
Proper access rights are set during setup initialization. In case there is any problem there, user can manually set access to Read for all users and Write to Admins.