Full Site Check page in 360 Monitoring dashboard does not load

Symptoms

• Clicking Full Site Check in 360 Monitoring dashboard triggers a session error and redirects to the homepage.
• Error message flashes: "Invalid session. Please log in again."
• Issue persists after:
  • Clearing cookies, cache, and session data.
  • Using different browsers (Chrome, Safari) or incognito mode.
• Browser console (F12 on most browsers) shows errors:
  • Failed to load resource: Certificate for [domain] is invalid.
  • CORS errors for authentication endpoints (e.g., auth.koalityengine.com).
• The device is a managed, corporate device connected to an internal network.
• The page works on a common, non-managed device directly connected to the internet.

Cause

Corporate firewalls block connections to required Plesk 360 domains *.platform360.io and *.koalityengine.com.

Resolution

Ask your IT team to whitelist the following domains in the corporate firewall:

• *.platform360.io
• *.koalityengine.com