Hi @DougBass,
I found this other post (The app host returned HTTP response code 403) with a similar report and what the team suggested was to:
- set
logging.level.com.atlassian.connect.spring: DEBUGin the application configuration - check the logs for the installation request
By the way, it looks like the problem was addressed by creating a new app so the root cause was never fully understood.
Caterina