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I have a Web API project that has been working for about a year now.
Yesterday it suddenly stopped working.

It will not respond to any requests made from Swagger, Postman, or the Angular client specifically using this API.

Swagger, Postman, etc. just hang. No error code, simply no response.

I have placed breakpoint in the controller and not even the constructor is being called.

Any insights are greatly appreciated.

What I have tried:

I have applied the latest patches to Visual Studio 2019.
It is using .NET Framework 4.6.1
Member 15627495 14-Jul-23 17:06pm    
it could be a 'certificate' out of date ...

right click on the big exe file of your API, search for 'certificate'.

it seems the API is out of certificate life.

to renew one, you could buy a long certificate.
Graeme_Grant 14-Jul-23 20:45pm    
Did you ping the server to see if it is alive? Did you try restarting the server? Did you check the server & hosting logs?

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