NuGet Error NU5025
The assets file found does not contain a valid package spec. Try restoring the project again. The location of the assets file is F:\project\obj\project.assets.json.
Issue
The project passed to the msbuild -t:pack
does not contain a valid assets file in the obj directory.
Solution
Please run msbuild -t:restore -p:restoreforce=true
operation on the project being packaged before running the pack operation.