A red X next to any device indicates that the device is offline.
There are three primary reasons for an offline device:
no network connection on the device
firewalls preventing connection to embed (see here for more on firewalls)
the embed application is not currently running
IMPORTANT: To download content published from your account, the device needs to be online, connected to embed and running the embed application.
When you hover over the red cross you will see the time and date of when the device was last online.
Why does my device need to be online?
Your device needs to be online to download any published content or to get live data (for features such as weather, RSS feeds, Power BI, YouTube etc..)
Offline Playback duration:
Depending on the device OS and embed application version, your device can run offline for a specific period of time before the content stops.
Maximum 28 days offline playback
Android - embed app v4.1.1
iOS - embed app v4.1.2
macOS - embed app v4.2.1
ChromeOS - embed app v1.1.5
ONELAN - embed app v1.1
Samsung SSP - embed app v3.6.2
Run content offline for the duration of the license period
Windows - embed app v4.3.2+
BrightSign - embed app v2.0.9+
Samsung Tizen - embed app v1.3.1+
LG WebOS for Signage - embed app v1.2.0+
Device specific troubleshooting guides:
Select the device operating system below for more help getting your device online:
BrightSign
iOS
ONELAN