Hi Epic-Team,
I have experienced following error:
Internal compiler error inside CreateExecutionSchedule; please contact framework team as we need a repro for this bug!
When and how: It suddenly came up in a BP which has worked well for last week. Yesterday I spent day adding network functionality to my game and when I closed and re-openend my project hours later, it crashed when I clicked on play. I then found out that it appears during a cast to my custom PlayerController. wires had unattached themselves and when I tried to reattach them and compiled, “internal compiler error” came up.
problems it brings are rather huge: I can’t open my project anymore. It crashes on editor startup.
I had recently encountered this bug in another project which I created (UE crashes after behavior tree tests - AI - Epic Developer Community Forums). However, these two projects are almost entirely different: earlier one was a space shooter, relying heavily on Paper2D, own content and using source control (SVN). one I work on at moment is a test project with a Zelda-like top-down camera, no self-made content at all and network functionality.
Below you can see a screenshot of error. It is from other project, but it looks almost identical. A log from current project is also attached.
As I now have two projects on hold because of identical issue, I would really appreciate some help! 
If I can provide any additional information, please let me know.
I will try to work with it (I’m still a litte uneasy abouth this because this error made me tear my hair out for past few weeks) and report back if issue returns!