Getting this quite a bit recently. Downloaded the latest 1.4.0b release (which still says 1.4.0 in the app) with no improvement.
The “Learn more” link leads to https://cryptonomic.zendesk.com/hc/en-us/articles/6587884720653, posted over a year ago. Concern if this has been going on for a year…
Would switching to a different node help?