What Happened??? – Microsoft Power BI Review

After the auto update for 4.0 hit yesterday (7/30), the app does not open any longer on either my iPhone 6 or iPad Air 2, both with iOS 8.4. It hits the opening logo and then dies. Please fix ASAP. Even after a reboot of both, the app still shows the same issues.
Review by Willin on Microsoft Power BI.