Solve Error : Microsoft.AspNetCore.Server.Kestrel[0] Unable to start Kestrel.System.InvalidOperationException: Unable to configure HTTPS endpoint. No server certificate was specified, and the default developer certificate could not be found.
Hello all dev..
How are you? i hope we fine anywhere and anytime,
Okay, i will share my step to solve this error.
I use .Net Core 2.1.3 preview, i use macbook, when i run "dotnet run" i get error
"Microsoft.AspNetCore.Server.Kestrel[0]
Unable to start Kestrel.
System.InvalidOperationException: Unable to configure HTTPS endpoint. No server certificate was specified, and the default developer certificate could not be found.
To install the developer certificate first install the dev-certs tool by running 'dotnet install tool dotnet-dev-certs -g --version 2.1.0-preview1-final' and then run 'dotnet-dev-certs https'. To trust the certificate (Windows and macOS only) run 'dotnet-dev-certs https --trust'."
so, i search from internet, and i run this command "dotnet dev-certs https --clean" but i still get error,
finally, i re-create a new cert,
this is my step for solve it :
How are you? i hope we fine anywhere and anytime,
Okay, i will share my step to solve this error.
I use .Net Core 2.1.3 preview, i use macbook, when i run "dotnet run" i get error
"Microsoft.AspNetCore.Server.Kestrel[0]
Unable to start Kestrel.
System.InvalidOperationException: Unable to configure HTTPS endpoint. No server certificate was specified, and the default developer certificate could not be found.
To install the developer certificate first install the dev-certs tool by running 'dotnet install tool dotnet-dev-certs -g --version 2.1.0-preview1-final' and then run 'dotnet-dev-certs https'. To trust the certificate (Windows and macOS only) run 'dotnet-dev-certs https --trust'."
so, i search from internet, and i run this command "dotnet dev-certs https --clean" but i still get error,
finally, i re-create a new cert,
this is my step for solve it :
- dotnet install tool dotnet-dev-certs -g --version 2.1.0-preview1-final
- dotnet dev-certs https --trust
- enter your password for mac
- succesfully, re-type dotnet run
Okay, i hope this is so helpfully for us, and good luck in our life, thanks.☺

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