Can't sign into PowerApps. Getting:
Hmmm ... We couldn’t sign you in.
Solved! Go to Solution.
The only thing that worked for me was clearing my cookies. In chrome right click in white space on the power apps screen with the error > Inspect > Go to 'Application' at the top > On the left hand menu under Storage expand Cookies > Right click https://web.powerapps.com and clear... refresh... worked for me and I've been getting this error for a week.
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