Hi,
I can’t figure out what is wrong here. I used that blueprint in my previous game and everything was working properly. But now, when is press InteractionKey - nothing happens. Is there something that I missed or what?
Yes, it has and for some reason it doesn’t react and I have no idea what MORE could go wrong.
Does your New project have InteractionKey in its input action mappings in its project settings?
I see the problem: You didnt connect your Timeline’s Update pin to the Set Actor Rotation node. The rotation change never happens because it is never told to execute.
Oh, no, it’s not the reason. I must have forgotten to pin it when I was modifying the blueprint to see if other ways will work, but I connected it later and still - nothing.
Set Auto Receive Input = Player 0 in your Door_BP Class Defaults settings.
Thank you very much, it works! 
You’re welcome.
Actors don’t receive input by default. You can dynamically change this setting with the Enable Input and Disable Input nodes.