Annoyance: "The online session was cancelled at your request"

I have the latest version of Quicken Premier and I use one-step update almost every day, for multiple accounts. More than half of the time, one or two accounts fails to update, and Quicken tells me The online session was cancelled at your request

This is really annoying, since I never cancel online sessions. Almost every time, retrying the one-step update causes the recalcitrant accounts to update.

Any suggestions?