Spotify not playing on Bluos System

[Lee68]

My Bluos system will no longer play Spotify. It was working fine last week. I have a NAD C700. The App and Spotify are linked, and the Spotify graphics come up on the NAD, but there is no sound, and it keeps trying to go to the next song. Sound is working on the Bluos system through the App with other music services. Spotify is working fine through Bluetooth, Google Cast, and my car. Basically, Spotify works fine on everything except the Bluos system. The Bluos system works fine for everything except Spotify.  I have reset everything and reinstalled both the Spotify and Bluos apps. Bluos support sent me a list of troubleshooting steps, which I have followed, but nothing works. They are saying it's a Spotify issue.  This is their message, which I have followed but without success:  Thank you for contacting the BluOS Support Crew.   I am sorry to hear you are experiencing issues with your BluOS devices in the Spotify app. Though this is completely controlled by the Spotify App, it is recommended to try the following basic troubleshooting steps to resolve the issue:   1. Please visit Spotify.com's account page. 2. Log into your account. 3. Disconnect all devices from the account page (Sign Out Everywhere). 4. Unplug the power cable from all your BluOS Players. 5. Unplug your router and wait for 10 seconds to plugin again. 6. Wait for 5 minutes and then reconnect all your devices. 7. In the BluOS App, verify if all the Players are displayed. 8. In the required BluOS Player, under Music Services, Spotify, logout the previous user if one is connected. 9. In your phone or tablet Network Settings, ensure that the Use Cellular Data option is enabled as Spotify uses this to triangulate your account. 10. Log in to Spotify on your mobile device or computer. 11. In the Spotify App, under Settings, enable Show Local Devices only. 12. Establish a connection with your BluOS players through Spotify Connect.

[Ivelina]

Hey @Lee68,

Thank you for reaching out via the Community and for sharing what steps you've gone over so far.

Did you notice if the playback issue occurred after something specific for the first time, such as an update for example?

It could be worth troubleshooting the connection and I recommend trying with the following:

• Since you've restarted your router, change the DNS settings to one of these: 8.8.8.8; 8.8.4.4; 9.9.9.9 or 1.1.1.1
• Test with another Wi-Fi connection (if it's possible and it's available). You could even test with sharing mobile data via hotspot.

Let us know if any of these make a difference and we're here if you need help with anything else in the meantime. 

[Lee68]

Hopefully, this helps someone else save many hours searching for the fix. I have successfully identified the solution.  After trying everything above with no success, switching off the IPV6 setting within my router's network settings worked.  I have Spotify playing again. I don't know why it stopped working in the first place because I didn't change anything.