Let's get your Smart Home Manager working, @smwall! 

First, we recommend uninstalling and reinstalling the app. This can clear up most common issues.

If that doesn't help, you can try restarting your gateway. This should refresh the connection to Smart Home Manager and could clear up this error message.

1. Unplug the power cord from the back of your gateway or hub. If you have:
2. An internal battery backup, remove it.
3. DSL service, unplug your telephone cord from your modem or gateway.
4. Wait 20 seconds.
5. Put the internal battery back in, if applicable.
6. Plug the power cord back in. If you have DSL service, reconnect the telephone cord.
7. Wait up to 10 minutes for the gateway or hub to restart.

If this doesn't help, please let us know. We may need to take a closer look at your network settings.

Raiden, AT&T Community Specialist 

smart home manager APP works on iphone but Smart Home Manager webpage does not work on windows

The app works fine on my iphone. the problem is the on Windows...the Smart Home Manger gives the error.....

Hello @smwall, Thank you for clearing up where you are having the issue with the Smart Home app.

When we normally have browser issues the first step we would like to take is to try clearing and deleting your cache/cookies.

Here are some steps to help if you are running Chrome, Firefox, Internet Explorer^®, or Edge

1. Open your browser.
2. Press Ctrl+Shift+Delete.
3. Select the items you want to clear.
4. Select the Delete, OK, Clear, or Clear data button, depending on your browser type.
5. Close and reopen your browser.

If you are using a different browser you can refer to the link above.

When you are trying to use your Smart Home App on windows we suggest that you trying it on a diferent browser.  

Please let us know if this works for you. 

Demetria , AT&T Community Specialist

I tried the Smart Home  Manager on Chrome, Firefox and edge all the gave the same error, Is that really cache/cookies problem on all 3 of the browsers????

Thanks for updating us @smwall

In order to further help with your Smart Home Manager, we'll need to meet in a Direct Message. We'll need to gather some further information from you, so we're able to take a closer look into why this is happening. Please check your Direct Message inbox (it's the chat icon next to the bell icon in the upper right corner of the Forums).

We look forward to hearing from you. 

LaPorshia, AT&T Community Specialist

I see no chat icon next to the bell icon in the upper right corner of the Forums?????