Using New Outlook on Windows for professional communication and productivity
Try that one
found a solution.
Copy that folder as a backup
"C:\Users\dinle\AppData\Local\Microsoft\Olk\EBWebView\Default\Local Storage\leveldb"
Delete that folder totaly
"C:\Users\dinle\AppData\Local\Microsoft\Olk\EBWebView"
Open one time New Outlook (It will come to setup page never mind close new outlook)
Go to
"C:\Users\dinle\AppData\Local\Microsoft\Olk\EBWebView\Default\Local Storage" folder and past your backup folder inside your backup is leveldb folder and past it and rewrite it.
Than open your New Outlook and you can reach settings and you will not lose any mail or mail setup.