Troubleshooting Common ASP.NET Issues on Windows Server 2019 Print

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While Windows Server 2019 offers a robust platform for hosting ASP.NET applications, issues can sometimes arise. This guide provides solutions for common problems encountered when running ASP.NET apps on a Windows Server 2019 environment.


  • Windows Server 2019 with Plesk Panel installed
  • Working ASP.NET application
  • Administrative access to both the server and Plesk Panel

Common Issues and Solutions

Issue 1: Application Pool Crashes

Symptoms: Frequent application pool crashes resulting in 503 Service Unavailable errors.


  • Check the Event Viewer for any error messages related to the application pool.
  • Update the application pool identity or verify if it has the required permissions.
  • Recycle the application pool.

Issue 2: Slow Application Performance

Symptoms: Pages take a long time to load, high CPU usage.


  • Review your code for any performance bottlenecks.
  • Use caching strategies.
  • Check SQL queries for optimization.

Issue 3: Permission Issues

Symptoms: 401 Unauthorized or 403 Forbidden errors.


  • Ensure proper file and folder permissions.
  • Verify the authentication and authorization settings in your application.

Issue 4: SSL/TLS Errors

Symptoms: Certificate errors or "Connection Not Secure" warnings in the browser.


  • Confirm the SSL certificate is properly installed.
  • Update or renew the SSL certificate if it's expired.

Issue 5: 500 Internal Server Error

Symptoms: General error message that doesn't provide specific information about the problem.


  • Check server logs for more detailed error messages.
  • Verify the web.config file for any malformed XML or incorrect settings.


Troubleshooting is a key component in managing a stable and secure ASP.NET environment. With this guide, you'll be better equipped to identify and solve common issues that can occur on Windows Server 2019.

Further Support

If you're still experiencing issues or need more specialized guidance, you can refer to our detailed knowledge base at or submit a ticket for more personalized support at

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