failed to load resource the server responded with a status of 403 ()

If your application uses authentication, check if the authentication token has expired. Renew the token if needed.

A 403 error typically indicates that the server understood the request but refuses to authorize it. Examine the server logs for more detailed information about the 403 error. The logs might provide insights into what specific resource or endpoint is being accessed and why it's being denied.

Please check the Patch is correct .

Is it an ASP.NET (.NET Framework) project or an ASP.NET Core (.NET CORE/ .NET 5 +) project? As for .NET Core projects Hosting Bundle (https://dotnet.microsoft.com/permalink/dotnetcore-current-windows-runtime-bundle-installer) must be installed on the server.

Please refer to this article

https://learn.microsoft.com/en-us/aspnet/core/tutorials/publish-to-iis?view=aspnetcore-8.0&tabs=visual-studio

When encountering a "Failed to load resource" error in Dot Net, specifically with a status of 403, it indicates that the server is denying access to the requested resource. This error is typically related to permissions or authentication issues.

To troubleshoot this error, you can follow these steps:

1. Check the resource permissions: Ensure that the resource you are trying to access has the appropriate permissions set. Verify that the user or application pool identity has sufficient access rights to the resource.

2. Verify authentication settings: If the resource requires authentication, ensure that the authentication settings are correctly configured. Check the web.config file for any authentication-related settings and make sure they match the requirements of the resource.

3. Check for URL authorization rules: If you have URL authorization rules in place, verify that they are correctly configured and allow access to the requested resource. You can check the web.config file for any  sections or custom authorization rules.

4. Review server logs: Check the server logs for any additional information about the error. The logs may provide more details about the specific cause of the 403 error.

5. Test with a different resource: Try accessing a different resource on the server to determine if the issue is specific to the requested resource or a more general problem. This can help narrow down the troubleshooting process.