Fix Certificate not trusted error with Enable Play Content over HTTP in Synology Photos App (Android) Estimated reading: 0 minutes 286 views Contributors Summary: If you get this error message "Your certificate is not trusted by Chromecast" when trying to cast with Synology Photos to Google Chromecast, you need to enable play content over HTTP. Tagged:AndroidChromecastPhotosSynology Fix Certificate not trusted error with Enable Play Content over HTTP in Synology Photos App (Android) - PreviousInstall Synology Photos App (Apple iOS)Next - Fix Certificate not trusted error with Enable Play Content over HTTP in Synology Photos App (Android)Fix Certificate not trusted error with Enable Play Content over HTTP in Synology Photos App (Apple iOS)