The tap here link does not work. Google chrome will not allow me to view my saved tabs for powerapps anymore either. Edge browser gives the same authentication error with no link.
Did you mean that you cannot access this app from PowerApps or did you mean that you cannot even access the PowerApps site at all?
If you cannot access PowerApps site with Chrome and Edge, please try to access with IE browser. And try to clear cache before accessing.
If you still can access PowerApps site, please navigate to the Connections list, and make sure that your connections' status are Connected.
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