Multiple errors thrown on installing Cinemachine from package manager. Refer the screenshot

Steps to reproduce:
1) Create a new project
2) Window > Package Manager
3) Install Cinemachine package.

Expected result: No error in console.
Actual result: Multiple errors thrown in the console.

Reproducible in: 2019.1.0a13, 2019.1.0a1
Working fine in: 2018.3.1f1

Environment: Windows and Mac

Note:

- The package is completely broken as there is no menu available to create Cinemachine camera or any component of Cinemachine. Downgrading the package also throws the same errors and is currently not usable for 2019.1

Stack trace:
1)Library\PackageCache\com.unity.cinemachine@2.2.8\Runtime\Timeline\CinemachineShot.cs(3,19): error CS0234: The type or namespace name 'Timeline' does not exist in the namespace 'UnityEngine' (are you missing an assembly reference?)
2)Library\PackageCache\com.unity.cinemachine@2.2.8\Runtime\Timeline\CinemachineTrack.cs(4,19): error CS0234: The type or namespace name 'Timeline' does not exist in the namespace 'UnityEngine' (are you missing an assembly reference?)
3)Library\PackageCache\com.unity.cinemachine@2.2.8\Runtime\Timeline\CinemachineShot.cs(16,58): error CS0246: The type or namespace name 'IPropertyPreview' could not be found (are you missing a using directive or an assembly reference?)
4) Library\PackageCache\com.unity.cinemachine@2.2.8\Runtime\Timeline\CinemachineTrack.cs(15,37): error CS0246: The type or namespace name 'TrackAsset' could not be found (are you missing a using directive or an assembly reference?)
5) Library\PackageCache\com.unity.cinemachine@2.2.8\Runtime\Timeline\CinemachineShot.cs(28,65): error CS0246: The type or namespace name 'IPropertyCollector' could not be found (are you missing a using directive or an assembly reference?)
6) Library\PackageCache\com.unity.cinemachine@2.2.8\Runtime\Timeline\CinemachineTrack.cs(9,6): error CS0246: The type or namespace name 'TrackClipTypeAttribute' could not be found (are you missing a using directive or an assembly reference?)
7) Library\PackageCache\com.unity.cinemachine@2.2.8\Runtime\Timeline\CinemachineTrack.cs(9,6): error CS0246: The type or namespace name 'TrackClipType' could not be found (are you missing a using directive or an assembly reference?)
8) Library\PackageCache\com.unity.cinemachine@2.2.8\Runtime\Timeline\CinemachineTrack.cs(13,6): error CS0246: The type or namespace name 'TrackBindingTypeAttribute' could not be found (are you missing a using directive or an assembly reference?)
9) Library\PackageCache\com.unity.cinemachine@2.2.8\Runtime\Timeline\CinemachineTrack.cs(13,6): error CS0246: The type or namespace name 'TrackBindingType' could not be found (are you missing a using directive or an assembly reference?)
10)Library\PackageCache\com.unity.cinemachine@2.2.8\Runtime\Timeline\CinemachineTrack.cs(14,6): error CS0246: The type or namespace name 'TrackColorAttribute' could not be found (are you missing a using directive or an assembly reference?)