I'm trying to connect to a Azure Data Explorer (Kusto) source on a completely fresh install. You can try this for https://help.kusto.windows.net/ but I've had the same problem with our production dat...
AlexGorev
Power BI Team
Power BI TeamThis is aknown issue and we are investigating. Please use this workaround for now:
Power BI Desktop customers may experience authentication issues attempting to connect to data source using AAD and may see the following error message "We're unable to connect. Please delete your credentials and try again later". As a workaround customers can go to Power BI Desktop and enable Options -> Security -> Authentication Browser -> “Use my default web browser”. Engineers are investigating the issue and an update will be provided soon.