Participants can't join Is lobby open? (Facilitator: Exercise page → Open lobby) Correct room code and password? Exercise already ended? Participant cap reached for your plan? Can't save scenario Check highlighted fields: name, narrative, phases, injects, questions Vote questions need ≥2 choices Every named phase needs ≥1 inject Can't start new exercise At completed exercise cap? Delete an old report/exercise first No scenario templates? Create or clone one Import JSON failed Export from /build or another org's export File must pass same validation as save Phase names and count cannot be changed in JSON imports — they must match the standard phases for the scenario type Feature shows a lock or upgrade banner CTEP files tab , AI Scenario Builder , and BC Program pages (BIA, Calendar, IT Assets, Vendors, Business Processes, Playbooks) require Plus or ProUse the upgrade link in the banner, or Settings → Billing 2FA locked out Contact support or org admin Billing / incomplete subscription Finish plan selection at Settings → Billing Only billing page accessible until subscription active Business context / BC Program grayed out "Department" in reports Ready to run your first exercise? Sign up for Breachday, build a scenario, and invite participants with a room code.