Why don't I have ASP.NET Core HTTPS development certificate?

Question

I'm having trouble in that running my brand new ASP.NET Core app in that it fails to load the website when I run the debugger (see screenshot at the bottom of the question).

I have a hunch this is because of an issue with the certificate so I tried to trust the certificate with the following command:

dotnet dev-certs https --trust

It errors:

PM> dotnet dev-certs https --trust
Trusting the HTTPS development certificate was requested. A confirmation prompt will be displayed if the certificate was not previously trusted. Click yes on the prompt to trust the certificate.
There was an error trusting HTTPS developer certificate.
PM> dotnet dev-certs https --check
A valid certificate was found.
PM>

There's a valid certificate but checking certificates per this answer, I don't see the certificate in Personal/Certificates or in Trusted Root Certification Authorities/Certificates either.

I'm a little stumped on a resolution; this affects all my Core applications so I can't get any development done.

Why don't I have a certificate there and how can I rectify this?

Try dotnet dev-certs https -v for list the certificates.

Max
– Max

2019-12-28 23:52:09 +00:00
Commented Dec 28, 2019 at 23:52 — Max
– Max, Commented Dec 28, 2019 at 23:52
Did you see the popup window?

Rena
– Rena

2019-12-31 02:40:34 +00:00
Commented Dec 31, 2019 at 2:40 — Rena
– Rena, Commented Dec 31, 2019 at 2:40
@Rena I did once... It doesn't appear anymore

Ortund
– Ortund

2020-01-06 12:30:41 +00:00
Commented Jan 6, 2020 at 12:30 — Ortund
– Ortund, Commented Jan 6, 2020 at 12:30
Have you tried running the terminal in admin mode?

Jim Aho
– Jim Aho

2020-09-17 06:35:43 +00:00
Commented Sep 17, 2020 at 6:35 — Jim Aho
– Jim Aho, Commented Sep 17, 2020 at 6:35

user23089173 · Accepted Answer · 2023-12-12 17:24:08Z

1

Sometimes you have to remove "old" certificates - check if you have more than one certificate installed (dotnet dev-certs https -v). If this is the case the following steps helped in my case.

Finish Visual Studio
Remove all certificates by calling dotnet dev-certs https --clean (command line admin mode)
Create a new certificate by calling dotnet dev-certs https --trust
Start Visual Studio again

answered Dec 12, 2023 at 17:24

user23089173

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