RESOLVED, and confirmed that this is working again as of 4/16/2019 Recently I have had a few different datasets linked to my personal Gateway and shared Gateway that have had issues with credentials...
Same issue here. Re-installed everything and installed latest april release desktop and it still did not resolve issue. Unable to get credentials to clear on the service and therefore scheduled refresh is no longer working. Something in this April release looks to have broken from what i can tell. Anyone else? Please vote! Lets get some attention on this one.