Delete WebApplication Error: Object reference not set to an instance of an object. How to solve this?

Hello, I am new to Sharepoint to CA configuration.

I have tried to create an web application, and half way during the creation, I got an error.

Now I want to delete the Web Application and I got this error: Object reference not set to an instance of an object.

I tried using powershell to remove the web application also got error.

I have checked the Content DB is empty, IIS doesn’t show this site, virtual directory doesn’t exist.

How do it solve this?

Regards,

Vin

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