Uipath CLI Pack cannot retrieve our custom library from on-prem orchestrator

From Azure DevOps, we are using “UiPath CLI Pack” to build the nupkg using a buildspec file But, when the project references a custom library published in our Tenant (in On-Prem orchestrator) the builder cannot retrieve our custom Library. It throws below issue

**NU1801: Unable to load the service index for source https://[On-Prem Orch URL]/nuget/v3/49c93625-af48-4a38-92bf-5g5t7ade3c1a/index.json

Kindly help with this issue, its able to retrieve from marketplace but not able to retrieve from library of orchestrator