Blueprint editor problem.

Hi, after month of using UE, today, I wasn’t able to open any blueprint in editor.
I removed and reinstall engine, but without any result.
Second window looks like:
and I can’t open it.
Does anyone faced with this behavior and how to fix it?
PS: my os is Win 10.

last time this happened to me the window was acutally just very small, like size 0,0. try to maximize it by right-clicking on it in taskbar. Also this belong somewhere else, this is a bug with the editor not a blueprint related question.

Drag the game mode window by clicking and holding at the edge and bring it back into the editor window so it reattaches to the editor this should fix the problem