We did face some disruption in services yesterday, which are now resolved. It may be that you encountered some disruption during the time it took to recover from yesterday's incident. Extremely sorry for the inconvenience caused. Our technical teams quickly restored the services.
There may also be some planned maintenance activities, whcih usually don't cause any disruption. You can check the status of any service and upcoming maintenances on https://status.adobe.com and drill down to the relevant service. For Publish Online, details can be viewed at https://status.adobe.com/products/2971/
Again, sorry for the inconvenice. I hope that you'll continue to find excellent value in the products and services that you use.