Invoke-UDJavaScript and Get-UDElement gRPC Errors

Product: PowerShell Universal
Version: 5.4.3

I know my version is a little out of date… I’m sorry. I have, though, looked at the 5.5.5 release of the UniversalDashboard.MaterialUI.psm1 file and seen that the structure of these commands is exactly the same.

When running Invoke-UDJavascript without -IgnoreReturn, I am returned this error:

Exception calling "SendWebSocketMessageWithResult" with "3" argument(s): "Status(StatusCode="Unknown", Detail="Exception was thrown by handler.", DebugException="Grpc.Core.Internal.CoreErrorDetailException: {"created":"@1752772257.187000000","description":"Error received from peer ipv4:127.0.0.1:59067","file":"..\..\..\src\core\lib\surface\call.cc","file_line":953,"grpc_message":"Exception was thrown by handler.","grpc_status":2}")"

The same occurs with Get-UDElement; the exact same error under the same circumstances.

My instance is behind an Azure application proxy, which I suspect may be causing this issue. How can I continue to debug this gRPC error 2 and get to the center of the issue?