Trying to send JSON messages from a React frontend to Unreal Engine 5.5 via Pixel Streaming.

I’m working on integrating a React frontend with Unreal Engine using Pixel Streaming, and I’m facing several issues with JSON message passing between React and Unreal. Specifically, errors like emitUIInteraction is not a function, Unsupported message 'uiInteraction' received from SS, and problems with callBlueprint or OnDataChannelMessage not triggering correctly in UE 5.5. I’ve set up the WebSocket communication and JSON structures correctly on the React side, but Unreal doesn’t seem to recognize or handle the messages properly. I’d really appreciate any guidance or examples from those who’ve tackled similar issues.