Ensure condition failed: TargetFunction != ActualTargetFunction

I can’t understand what is this error in the log, and how to solve it?link text

Error happens in blueprint editor code (which can also mean compiler). By look of other errors, how did you update your UE4? Can you effort to reset you UE4 editor configuration? as there seems to be lot of deprecated stuff as log screams

Return everything to default, or delete config inis (you can back them up just in case) from Saved/Config in you first in project directory (Which i think it the cause as you might have project from old UE version) and then try in engine directory, this will make engine replace them with default config files

I don’t quite understand what you mean by “reset you UE4 editor configuration”. Can you explain how and where to do it?

Unfortunately this does not help((