NuGet Warning NU3019

Scenario 1

Package 'SamplePackage v1.0.0' from source 'https://contoso.com/index.json': The timestamp integrity check failed.

Issue

The timestamp on the package signature has changed since it was generated by the Timestamp Authority.

Solution

Please try to re-sign and timestamp the package. If the problem persists, contact the Timestamp Authority to discover the source of the problem.

Scenario 2

Package 'SamplePackage v1.0.0' from source 'https://contoso.com/index.json': The primary signature's timestamp integrity check failed.

Issue

The timestamp on the package signature has changed since it was generated by the Timestamp Authority.

Solution

Please request the package author to re-sign the package using the nuget sign command as described in NuGet docs. If the problem persists, request the package author to contact the Timestamp Authority to discover the source of the problem.

Note

When running the nuget verify -signatures command, NU3019 is raised as an error. Otherwise, NU3019 is raised as a warning.