Need help with Azure App Service SharePoint Connectivity

Only Expert

Have a Azure Web App that stores and retrieves documents in a SharePoint document library. Has worked for years. Now it stopped and we can't get it to work - some kind of token error. Need fixed.

Thank You

Skills: Sharepoint, Azure, C# Programming, .NET, ASP.NET

About the Client:
( 95 reviews ) Karachi, Pakistan

Project ID: #34343700