NuGet Warning NU3007

Package 'SamplePackage v1.0.0' from source 'https://contoso.com/index.json': The package signature format version is not supported. Updating your client may solve this problem.

Issue

NuGet client tried to verify a package which has a higher package signature version than the one supported by this client.

Solution

Please ensure that you are using the latest version of the NuGet client. You can read more about the releases on NuGet.org.