Can't edit actor after creation

My problem is that everytime I create an AIActor for testing purposes and close the blueprint after creating it it will give me the following screen when I reopen it:

I hope somebody on here can help me with that issue

Sidenote:
Just recently I’ve been getting some dll errors when I started UE4 , could this be the cause for this strange behavior?

Thanks in advance

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://forums.unrealengine.com/unreal-engine/announcements-and-releases/1410408-unreal-engine-bug-submission-form

Thanks