DIAGNOSIS The built-in MyQ gateway has lost its connection to Chamberlain's servers, or there's a software glitch in the opener's logic board. This is a frequent headache with smart openers.
FIX First, reboot the entire system. Unplug the opener from power for 30 seconds, then plug it back in. Wait a full 5 minutes for it to completely reboot and attempt to reconnect. Open the MyQ app and pull down to refresh the status. This often clears a temporary server communication hiccup.
IF THAT DIDN'T WORK You may need to re-pair the opener to your MyQ account. In the app, remove the device from your account. Then, on the opener itself, hold the learn button until the indicator light blinks (this clears all Wi-Fi settings). Go through the full app setup process again as if it were a new opener, ensuring your phone is on the 2.4GHz Wi-Fi band.
HEADS UP Chamberlain's MyQ service occasionally has widespread outages. Before spending a lot of time troubleshooting, check a site like Downdetector or Chamberlain's Twitter/X support account to see if others are reporting issues. Sometimes you just have to wait it out.