Fix Certificate not trusted error with Enable Play Content over HTTP in Synology Photos App (Apple iOS) Estimated reading: 0 minutes 265 views Contributors Summary: If you get this error message "Your certificate is not trusted by Chromecast" when trying to cast with Synology Photos on an Apple iPhone or iPad (iOS) to Google Chromecast, you need to enable play content over HTTP. Tagged:Apple iOSChromecastPhotosSynology Fix Certificate not trusted error with Enable Play Content over HTTP in Synology Photos App (Apple iOS) - PreviousFix Certificate not trusted error with Enable Play Content over HTTP in Synology Photos App (Android)Next - Fix Certificate not trusted error with Enable Play Content over HTTP in Synology Photos App (Apple iOS)Ubiquiti