I added a nuget restore which works fine. Dev and Release build works fine on my pc. Its failing in Azure Devops restore.
Link to error txt Error.txt
My Csproj
<Project Sdk="Microsoft.NET.Sdk.Web">    
  <PropertyGroup>
    <TargetFramework>netcoreapp2.1</TargetFramework>
     <RuntimeFrameworkVersion>2.1.5</RuntimeFrameworkVersion>
    <UserSecretsId>aspnet-AspNetCorePagesIdentity-***************-***-*******-</UserSecretsId>
    <TypeScriptToolsVersion>3.0</TypeScriptToolsVersion>
    <AutoGenerateBindingRedirects>True</AutoGenerateBindingRedirects>
  </PropertyGroup>
  <ItemGroup>
    <Content Include="Client\assets\control-logo.png" />
    <Content Include="Client\assets\webrelay_170.png" />
  </ItemGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.5" />
    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="2.1.5" PrivateAssets="All" />
  </ItemGroup>
  <ItemGroup>
    <Folder Include="Areas\Identity\Services\" />
  </ItemGroup>
  <ItemGroup>
    <Content Update="Client\_ViewImports.cshtml">
      <Pack>$(IncludeRazorContentInPack)</Pack>
    </Content>
  </ItemGroup>
</Project>