How to fix this error list?

[BUGyyc]

An error occurred while resolving packages:
Project has invalid dependencies:
com.unity.ads: Cannot connect to 'staging-packages.unity.com:443' (error code: ENOTFOUND).
com.unity.cinemachine: Cannot connect to 'staging-packages.unity.com:443' (error code: ENOTFOUND).
com.unity.entities: Cannot connect to 'staging-packages.unity.com:443' (error code: ENOTFOUND).
com.unity.mathematics: Cannot connect to 'staging-packages.unity.com:443' (error code: ENOTFOUND).
com.unity.render-pipelines.core: Cannot connect to 'staging-packages.unity.com:443' (error code: ENOTFOUND).
com.unity.scriptablebuildpipeline: Cannot connect to 'staging-packages.unity.com:443' (error code: ENOTFOUND).
com.unity.shadergraph: Cannot connect to 'staging-packages.unity.com:443' (error code: ENOTFOUND).
com.unity.xr.oculus.standalone: Cannot connect to 'staging-packages.unity.com:443' (error code: ENOTFOUND).
Package com.unity.transport@file:E:\github\HD-FPS-Master\Packages\com.unity.transport has invalid dependencies:
com.unity.collections: Cannot connect to 'staging-packages.unity.com:443' (error code: ENOTFOUND).

A re-import of the project may be required to fix the issue or a manual modification of E:/github/HD-FPS-Master/Packages/manifest.json file.

[CertifiedRice]

what version of unity are you using?

[Vikassingh121]

2021.3

[Vikassingh121]