Fix for worker thread spawning of python

WebServer/Controllers/PythonInterop.cs

@@ -16,6 +16,9 @@ namespace PythonInterop {
 
             // Initiilize python
             PythonEngine.Initialize();
+
+            // Needed because C# calls the python from each connections worker thread
+            PythonEngine.BeginAllowThreads();
         }
 
         // This is thread blocking, runs on the main thread, and takes multiple minutes so probabaly need to run on a background thread at some point