failing WebSocket opening handshake ('WebSocket connection denied: origin 'file://' not allowed')

Question

I'm facing this error when i'm trying to connect to a websocket server

dropping connection to peer tcp4:127.0.0.1:49528 with abort=False: WebSocket connection denied: origin 'file://' not allowed

while I'm running my python server on localhost and I have a .exe electron app trying to connect to the python server using websockets However the connection is done correctly if I'm running the electron app using npm start I need it to work also from the .exe My server code

class Server():
    def __init__(self, ip, port):
        log.startLogging(sys.stdout)
        self.factory = WebSocketServerFactory("ws://{}:{}".format(ip, port))
        self.factory.protocol = protocol.MainServerProtocol

        # there should only be one connection at a time
        self.factory.setProtocolOptions(maxConnections=1)
        self.factory.setProtocolOptions(allowedOrigins="*")
        self.ip = ip
        self.port = port

    def run(self):
        try_to_listen(True, reactor, self.port, self.factory)
        reactor.run()