Here are the conditions I'm getting this problem to occur.
Any structures in the structure's file: No
Name in structure block: Gate Dn
Redstone current applied: Yes
You can take a look at the crash report. Exception: Cannot update neighbors.
World is practically unplayable now as the world will continue to crash every time it is opened.
This should be fixed now since MC-123064 has been fixed.
Are you still experiencing this crash?