vidgear: Python 2 MultiServer Mode, ValueError: [ERROR]: Failed to connect address

I use the testing branch of vidgear to use use Multiserver Mode.

running this part of code on a raspberry pi 3B + that transmits the video from a USB camera to a computer.

from vidgear.gears import NetGear
from vidgear.gears import CamGear
import cv2

#Open live video stream from device at index 0
stream = cv2.VideoCapture(0) 

#activate multiserver_mode
options = {'multiserver_mode': True, 'flag' : 0, 'copy' : False, 'track' : False}

#change following IP address '192.168.1.xxx' with Client's IP address and assign unique port address(for e.g 5566).
server = NetGear(address = 192.168.x.x, port = '5566', protocol = 'tcp',  pattern = 2, receive_mode = False, **options) # and keep rest of settings similar to Client

# infinite loop until [Ctrl+C] is pressed
while True:
	try: 
		(grabbed, frame) = stream.read()
		# read frames

		# check if frame is not grabbed
		if not grabbed:
			#if True break the infinite loop
			break

		# do something with frame and data(to be sent) here

		text = "Hello, I'm Server-1 at Port Address: 5566."

		# send frame and data through server
		server.send(frame, message = text)
	
	except KeyboardInterrupt:
		#break the infinite loop
		break

# safely close video stream.
stream.release()
# safely close server-1
server.close()

I get this error: ValueError: [ERROR]: Failed to connect address: tcp://192.168.0.107:5566 and pattern: 2! Kindly recheck all parameters.

Tracking the problem, it originates in line 477: self.msg_socket.bind(protocol+'://' + str(address) + ':' + str(port))

testing this code in python3 works fine.

Is the problem due to the python version?