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This is happening when I click on new app . This is happening in IE 11 . tried in chrome not getting this error
Where are you located (country)?
What is the url in the address bar once this error is reported?
Also try opening the developer tools (F12) before clicking New App, that might give us some more clues as to the error.
https://us.create.powerapps.com/studio/?access_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsIng1dCI6IjlGWERwYmZNRlQyU3ZRdVhoODQ2WVR3RUlCdyIsImtpZCI6IjlGWERwYmZNRlQyU3ZRdVhoODQ2WVR3RUlCdyJ9.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.Tm4In61mKRkSAqNgwzR17BjJSg7Bz_d-NJL2uoqSyxVYUiM_Phq9E-Eu51ll0dUHAIeWH3di1mmgq_DDzjKOGyxmDiMGXor-B21JcJgILGX4JNh0NvNW6iipAJ9NUaQB36VR3n3UxzibHcX3rfoHqCQR1jpiOm4oy5Lq7JCGD18iti86OomZ05bbmwhWf8dQDm6ZylBpAwjA05KDG9Ojrg2OWsCf0hlNbsDBAsfdAwuscaVDEiB0rRCfrArKrvHRNGDEx6Rq7GANqA24jzvVGTKF3ERNtmgsu8fpvbjDBApWS9mZ8ilbauiCccQFsaq2SyTsM-dKtRnlFovg01hPgg&token_type=Bearer&expires_in=3599&id_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsIng1dCI6IjlGWERwYmZNRlQyU3ZRdVhoODQ2WVR3RUlCdyIsImtpZCI6IjlGWERwYmZNRlQyU3ZRdVhoODQ2WVR3RUlCdyJ9.eyJhdWQiOiIwY2IyYTNiOS1jMGIwLTRmOTItOTVlMi04OTU1MDg1Zjc4YzIiLCJpc3MiOiJodHRwczovL3N0cy53aW5kb3dzLm5ldC80NGYxOGUzYy1iYTI2LTRmZmMtOWFmNC1hZjJlNGNhZWEyMjAvIiwiaWF0IjoxNDk4MDcxMzAzLCJuYmYiOjE0OTgwNzEzMDMsImV4cCI6MTQ5ODA3NTIwMywiYWlvIjoiQVNRQTIvOERBQUFBb3EwczBiUGpLd
Which page is the "new app" button you are clicking on?
This is teh url
https://us.create.powerapps.com/v2.0.652.0/studio/authloginerror.html#errorKind=UserInterventionNeeded_StorageLost&errorDescription=Transient%20storage%20was%20lost%20after%20navigating%20to%20AAD%20login.%20This%20can%20happen%20in%20IE%20and%20Edge%20if%20Trust%20Zones%20are%20misconfigured.
Also the replyto message in the IE is notworking.I cannot type anything under Rich Text or HTML
How did you get a "new app" button on that error page? I'm really confused now.
Suggest you fix the browser settings, per the link on the page you posted:
https://support.microsoft.com/en-us/help/4023606/troubleshooting-startup-issues-in-powerapps-web-authoring
Once you can get to the web Studio we'll see what happens.
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