Assertion failed - Serial Size Mismatch in Maps/StarterMap_BuiltData.StarterMap_BuiltData

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1

Hi!
My editor instance has been crashing whenever loading the StarterMap after a few blueprints in it.
Error code (without the LoginId or EpicAccountId): CrashReport - Pastebin.com
This is not a C++ project, strictly blueprinting.