GetPlayerController returns NULL in Level Blueprint (loading new level)

I have two levels: Init and Bus.

In Init Blueprint, on collision with door I load the Bus level:

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The problem is, whenever I use GetPlayerController in Bus Level Blueprint:

215899-acs.png

I get Accessed None trying to read property CallFucn_GetPlayerController_ReturnValue, so my GetPlayerController returns NULL.

Why is so? The same Level Blueprint works fine in Init Level.

The GetPlayerController return NULL in Bus Level Blueprint both when I go there from Init Level (with Open Level) and when I run Bus Level directly in Editor.