Why I get 'Failed to load resource: the server responded with a status of 503 (Service Unavailable)'?

Ionut Dragomir 26 Reputation points

I have a problem with a server-client project. The server is a ASP MVC project, and the client is an Angular project. When I deploy my server project through IIS and browse it using external IP, I get this:

If I browse it using localhost, it works fine. How could I solve my problem?
I'm using Windows 10 Pro. IIS version: 10.0.19041.1

Internet Information Services
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  1. Reza-Ameri 16,141 Reputation points

    It might be due to application crash and the best way to start investigating this issue is to look into the Event Viewer for the affected server and investigate log files.
    Open the IIS and look into the Application Pool associated with the website and make sure it is on and started.

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