TFS2015 witadmin exportwitd Error

I am using on-premise TFS 2015(15.117.27024.0). I created a new root project and wanted to export the Work Item definitions so I can add a few fields that are not in the default layout, as described here

I can export the project config and categories without any issue.

The command I am running(replaced URL with example.com):

"C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\witadmin" exportwitd /collection:"https://tfs.example.com/tfs" /p:"Library" /n:"Feature" /f:"Library_Feature.xml"

Result:

API resource location 8637ac8b-5eb6-4f90-b3f7-4f2ff576a459 is not registered on https://tfs.example.com/tfs.

I did this several years ago for another project but never had this problem.

Thanks for any help!

Solution

I tested on my side, cannot reproduce your issue, everything works as expected.

Whatever you can try below items to narrow down the issue:

Please check if you have specified the correct URL, make sure no any spelling errors.
Try running the export command on another machine which installed VS.
Try to export the WIT definition file with Process Editor (Power Tools)

Visual Studio 2015 : Microsoft Visual Studio Team Foundation Server 2015 Power Tools

Visual Studio 2017 : TFS Process Template Editor