DIAGNOSIS
This is a connectivity or account linking error. The device cannot reach the required service.
FIX
Follow this checklist. Reboot your Wi-Fi router. Reboot the Echo Show 10 (say "Alexa, restart"). Unlink and relink the problem service in the Alexa app: More > Settings > Music & Podcasts (or Video Calls & Messaging) > select the service > Unlink Skill, then re-link and log in.
IF THAT DIDN'T WORK
The device software may be outdated. Check for updates. Swipe down from top > Settings > Device Options > Check for Updates. Install any available update. This can take 15 minutes.
HEADS UP
The error 'sorry, something went wrong' (error code 10:5:3004:6004 for calls) often points to an Amazon server-side issue. Wait 30 minutes and try again. Check the Amazon Alexa Status page online for service outages.