Home: dotnet restore failed : Unable to load the service index for source https://api.nuget.org/v3/index.json.

[KaBaJIeP]

Details about Problem

NuGet product used (dotnet nuget):

NuGet version (NuGet Command Line 4.0.0.0):

dotnet --version (if appropriate): 1.0.1

OS version (i.e. win10 v1607 (14393.321)):

dotnet --info
.NET Command Line Tools (1.0.1)

Product Information:
Version: 1.0.1
Commit SHA-1 hash: 005db40cd1

Runtime Environment:
OS Name: ubuntu
OS Version: 16.04
OS Platform: Linux
RID: ubuntu.16.04-x64
Base Path: /home/google/.dotnet/sdk/1.0.1

Worked before? If so, with which NuGet version:

Yes, works on previous version of dotnet (project.json)

Detailed repro steps so we can see the same problem

1. create standard template : dotnet new mvc

2. try to add package : dotnet add package Newtonsoft.Json

Output :

Microsoft (R) Build Engine version 15.1.548.43366
Copyright (C) Microsoft Corporation. All rights reserved.

Writing /tmp/tmpi0mDf1.tmp
info : Adding PackageReference for package 'Newtonsoft.Json' into project '/var/lib/jenkins/workspace/www/www.csproj'.
log : Restoring packages for /var/lib/jenkins/workspace/www/www.csproj...
error: Unable to load the service index for source https://api.nuget.org/v3/index.json.
error: The type initializer for 'System.Net.Http.CurlHandler' threw an exception.
error: The type initializer for 'Http' threw an exception.
error: The type initializer for 'HttpInitializer' threw an exception.
error: Unable to load DLL 'System.Net.Http.Native': The specified module could not be found.
error: (Exception from HRESULT: 0x8007007E)

Other suggested things

if you will try add manually this package in *.csproj file
command : dotnet restore - will be failed with error: Unable to load the service index for source https://api.nuget.org/v3/index.json.

PS ^ this error behaviour the same for many others packages witch not start like Microsoft.*

And error not informative :(

Very helpful if you can zip a project and paste into this issue!

[emgarten]

this error behaviour the same for many others packages witch not start like Microsoft.*

Are any packages being restored?

It looks like the issue is in System.Net.Http. NuGet restore uses HttpClient from the framework.

[KaBaJIeP]

Yes, restored only if packages start from Microsoft.*
like : Microsoft.AspNetCore.Server.Kestrel, Microsoft.AspNetCore.Diagnostics, etc.

just if you create new project and call 'dotnet restore' - this action will be execute OK

[KaBaJIeP]

I found fix!
when we install libcurl3
from : https://launchpad.net/ubuntu/xenial/amd64/libcurl3/7.47.0-1ubuntu2.2
relay on yours arh server (for my ubuntu server it was amd64)
and after that this error with 'dotnet restore' disappear.

[emgarten]

That is extremely odd that some packages download and not others! Glad you were able to find the fix, I will keep it in mind if anyone else hits this.

[BenjaminHolland]

I've also experienced the same issue. I've got the curl version specified in the marked solution but it's still not working correctly.

[KaBaJIeP]

Hi, BenjaminHolland
you can try to install last curl from https://curl.haxx.se/ this helps too
or https://www.howtoinstall.co/en/ubuntu/xenial/curl

[Furynation]

I just encountered this as well. Running apt-get install libcurl3 addressed the issue for me. Thanks @KaBaJIeP!

[marcosradix]

I found how to fix!
when we install sudo apt install libcurl3
from : https://launchpad.net/ubuntu/xenial/amd64/libcurl3/7.47.0-1ubuntu2.2
relay on yours arh server (for my linux mint 18.2 it was amd64)
and after that this error with 'dotnet restore' disappear.
Its solved to me, thanks, KaBaJIeP .

[coderkemp]

any inputs on how to configure in Windows 10 environment if faced with a similar issue?

[fiofarinasso]

any inputs on how to configure in Windows 10 environment if faced with a similar issue?

Im having the same problem on Windows 10, could you find the solution?

[rrelyea]

If nuget.org is not accessible from your machine, please follow instructions currently located here: https://docs.microsoft.com/en-us/nuget/nuget-org/nuget-org-faq#nugetorg-not-accessible