GI output for inputsystem: b8c3982bffe426f0f25064849de3c602 (9d46f8b46361834b6db698cc77f2fe34) is missing.

followed by

Error adding system: Data not available.

Didn't have this problem in 5.3.2 but since moving to 5.3.4 I have this issue. Brand new project, moving between two scenes using the same terrain as a prefab. New scene is noticeably darker plus the errors people are describing

Have it in 5.3.4f1on both windows and mac when switching scenes through code. When the new scene loads the whole scene is dark and I get gi output for inputsystem is missing and error adding system errors. If I turn auto baking off for my scenes and manually bake the lights the scenes stop going dark and no more errors.

Same thing for me.

Same here, is there a solution? Also some things changes when switching between scenes...

Same in 5.3.4

I'm also receiving the notice warning and error when running my game in the editor and using SceneManager.LoadScene in version 5.3.3 but it isn't consistent, it seems that I have to move out of one scene and then I get the errors when I move back into that same scene or stop and replay the game in the editor

Same in 5.3.3

With 5.3.2 and 5.3.3 I started getting: Error adding system: Data not available.
UnityEditor.HostView:OnGUI() - when trying to build an existing iOS project. I had two additional errors with 5.3.2. I was sure that I had installed the iOS add-on, but to make sure, I installed it again. That didn't fix it. What's odd is under Applications/Unity/Unity (Show Package Contents) Contents/PlaybackEngines - I don't see iOS support - I only see Web Player - even though I installed for tvOS too - has that stuffed moved? Or is that the issue?

Same here..