Hi @Sheprekt, @halerooks,
I have looked into the World Partition source code for the UE5EA Engine, the failure line is in the middle of Editor World Partitioner, this has nothing to do with initialising the streaming.
I believe that commenting out this line will have no harm to the UE Editor. I have tried it on my UE50EA vs2022 repository, which will run on VS2019 only if you need to.
see Visual Studio 2022 Preview is 64 bit and compiles and runs UE 5.0 EA approximately 20% FASTER - Development Discussion / Unreal Engine 5 Early Access - Unreal Engine Forums
If this patch works tell me and I will submit an official bug report.