5.3.2 Editor Crash with mutiplayer: Netmode=Play As Client

I’ve just moved to 5.3.1 from 5.1.0 and every single time i try to test my game via netmode ‘Play as Client’, it crashes! Here is the editor crash popup:

Assertion failed: IsValid() [File:C:\Program Files\Epic Games\UE_5.3\Engine\Source\Runtime\Core\Public\Templates\SharedPointer.h] [Line: 1139]

UnrealEditor_DSSLite!TBaseSPMethodDelegateInstance<0,FConnection,1,void __cdecl(TSharedPtr<IHttpRequest,1>,TSharedPtr<IHttpResponse,1>,bool),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [C:\Program Files\Epic Games\UE_5.3\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:298]
UnrealEditor_HTTP
UnrealEditor_HTTP
UnrealEditor_HTTP
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
kernel32
ntdll

and here is an image of when i tried to do a ‘Play standalone’ so othat it would start up its own server/client that way i could test if it still crashed (the server crashes but the editor luckily doesnt crash).

I really dont know what else to try. I’m currently building the source engine with VS2022 Version 17.6 so i can test that tomorrow hopefully but i dont think thats going to help. In a new project as 3rd person template it does not crash so i know its my project but i dont even know where to begin to look or what even to do. I would greatly appreciate any and all help!

I have a similar problem with UE 5.3.2, my project is an open world where I manage to get all clients to join a dedicated server, but the problem started when I upgraded my project to this version. I began to experience issues when using Play as client. When I do debugging reviews, every client that joins has the same client ID of 0. I’ve been stuck on this issue for several days, and unfortunately, some time ago I deleted my backup of version 5.1 that I had. It’s a pity, but I hope this can be resolved