@Jithu Sebastian Thanks for reaching here!
There could be several reasons for the 500 Internal Server Error when uploading a file to the wwwroot folder in the development environment of Azure App Service. Here are some steps you can take to troubleshoot the issue:
- Check the logs: You can check the logs of your app service to see if there are any errors or exceptions being thrown. You can access the logs from the Azure portal by going to your app service, selecting "Log stream" from the menu, and then selecting "Application logs". This will show you the logs in real-time. You can also download the logs for further analysis.
- Check the file permissions: Make sure that the folder you are trying to upload the file to has the correct permissions. You can check the permissions by going to the Kudu console for your app service. To access the Kudu console, go to your app service in the Azure portal, select "Advanced tools" from the menu, and then select "Go". This will take you to the Kudu console. From there, you can navigate to the wwwroot folder and check the permissions.
- Check the file size: Make sure that the file you are trying to upload is not too large. There are limits on the size of files that can be uploaded to Azure App Service. You can check the limits for your app service plan in the Azure portal.
- Check the code: Make sure that your code is handling the file upload correctly. You can check the code to see if there are any errors or exceptions being thrown. You can also try debugging the code to see where the issue is occurring.
Further Azure provides built-in diagnostics to assist with debugging an App Service app. Check this article: how to enable diagnostic logging
Let us know if further query or issue remains.