Quit OneDrive. You can do this by selecting the cloud icon in the top tray, then selecting Settings > Quit OneDrive. Find OneDrive in your Applications folder and right-click OneDrive to select Show Package Contents. Browse to the Contents > Resources folder. Double-click ResetOneDriveApp.command (or ResetOneDriveAppStandalone.command, if you're using the standalone app). Restart OneDrive and finish the setup process.