KeyNotFoundException is thrown for every package found when trying to install.

Describe the bug KeyNotFoundException is thrown for every package found when trying to install.

KeyNotFoundException: The given key was not present in the dictionary. System.Collections.Generic.Dictionary2[TKey,TValue].get_Item (TKey key) (at <7ba07f088431485bb722f3b3373e87ee>:0) Coffee.UpmGitExtension.PackageUtils+<>c__DisplayClass2_0.<InstallPackage>b__0 (System.Collections.Generic.Dictionary2[TKey,TValue] manifest) (at Library/PackageCache/com.coffee.upm-git-extension@1.1.0-preview.13/Editor/Coffee.UpmGitExtension/Utils.cs:136) Coffee.UpmGitExtension.PackageUtils.UpdateManifestJson (System.Action1[T] action) (at Library/PackageCache/com.coffee.upm-git-extension@1.1.0-preview.13/Editor/Coffee.UpmGitExtension/Utils.cs:167) Coffee.UpmGitExtension.PackageUtils.InstallPackage (System.String packageName, System.String repoUrl, System.String refName) (at Library/PackageCache/com.coffee.upm-git-extension@1.1.0-preview.13/Editor/Coffee.UpmGitExtension/Utils.cs:126) Coffee.UpmGitExtension.InstallPackageWindow.onClick_InstallPackage () (at Library/PackageCache/com.coffee.upm-git-extension@1.1.0-preview.13/Editor/Coffee.UpmGitExtension/UI/InstallPackageWindow.cs:186) UnityEngine.Experimental.UIElements.Clickable.OnMouseUp (UnityEngine.Experimental.UIElements.MouseUpEvent evt) (at C:/buildslave/unity/build/Modules/UIElements/Clickable.cs:152) UnityEngine.Experimental.UIElements.EventCallbackFunctor1[TEventType].Invoke (UnityEngine.Experimental.UIElements.EventBase evt) (at C:/buildslave/unity/build/Modules/UIElements/Events/EventCallback.cs:62) UnityEngine.Experimental.UIElements.EventCallbackRegistry.InvokeCallbacks (UnityEngine.Experimental.UIElements.EventBase evt) (at C:/buildslave/unity/build/Modules/UIElements/Events/EventCallbackRegistry.cs:376) UnityEngine.Experimental.UIElements.CallbackEventHandler.HandleEvent (UnityEngine.Experimental.UIElements.EventBase evt) (at C:/buildslave/unity/build/Modules/UIElements/Events/EventHandler.cs:112) UnityEngine.Experimental.UIElements.EventDispatcher.ProcessEvent (UnityEngine.Experimental.UIElements.EventBase evt, UnityEngine.Experimental.UIElements.IPanel panel) (at C:/buildslave/unity/build/Modules/UIElements/EventDispatcher.cs:511) UnityEngine.Experimental.UIElements.EventDispatcher.Dispatch (UnityEngine.Experimental.UIElements.EventBase evt, UnityEngine.Experimental.UIElements.IPanel panel, UnityEngine.Experimental.UIElements.DispatchMode dispatchMode) (at C:/buildslave/unity/build/Modules/UIElements/EventDispatcher.cs:307) UnityEngine.Experimental.UIElements.BaseVisualElementPanel.SendEvent (UnityEngine.Experimental.UIElements.EventBase e, UnityEngine.Experimental.UIElements.DispatchMode dispatchMode) (at C:/buildslave/unity/build/Modules/UIElements/Panel.cs:176) UnityEngine.Experimental.UIElements.UIElementsUtility.DoDispatch (UnityEngine.Experimental.UIElements.BaseVisualElementPanel panel) (at C:/buildslave/unity/build/Modules/UIElements/UIElementsUtility.cs:245) UnityEngine.Experimental.UIElements.UIElementsUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at C:/buildslave/unity/build/Modules/UIElements/UIElementsUtility.cs:68) UnityEngine.GUIUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at C:/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:179)

To Reproduce Steps to reproduce the behavior:

1. Install the UpmGitExtension
2. Create a repository and create a package to be imported (this repo is private)
3. Click the Package Manager UPM orange button in the bottom left to add the package
4. Enter the package repo url
5. Search for the repo package
6. Note that the package is found successfully
7. Pick a version from the dropdown to install (all versions appear for me)
8. Press the button to install the version
9. Error is thrown in the console

Expected behavior Package should be imported

Environment

• Version 1.1.0 preview 13
• Platform: Windows 10
• Unity version: 2018.4.10

[TCROC]

@mob-sakai @cookie966507 I think we are good to close this issue now

[TCROC]

@mob-sakai I opened up a pull request.