Package Manager: Error while getting product update details: Failed to parse response: Code 299 "Aborted Request"

Description

Since the introduction of hosting UPM packages on the Asset Store, we received reports from users getting an error at project launch if their project contains such a package.

Repro Steps

1. To your Unity project, install a UPM package hosted on the Asset Store (eg. Meta XR Core SDK
2. Launch your Unity project

Actual Result

Console throws error:

[Package Manager Window] Error while getting token info: Server response is "Aborted Request" [Code 299]
UnityEditor.AsyncHTTPClient:Done (UnityEditor.AsyncHTTPClient/State,int)