ctypes.ArgumentError: argument 1: TypeError: wrong type

[mhd-fauzan]

I made a GUI to be able to mute windows. After I created the GUI and the script to control the sound I linked the two together. When I run the script, there is an error ctypes.ArgumentError: argument 1: TypeError: wrong type, the error is in the script line volume.SetMute(boolMute, None) contained in the mute() method. Here I show the code.

import customtkinter
from customtkinter import filedialog
from ctypes import cast, POINTER
from comtypes import CLSCTX_ALL
from pycaw.pycaw import AudioUtilities, IAudioEndpointVolume, ISimpleAudioVolume

# System Setting
customtkinter.set_appearance_mode("Light")
customtkinter.set_default_color_theme("blue")

class Myapp():
    
    devices = AudioUtilities.GetSpeakers()
    interface = devices.Activate(
       IAudioEndpointVolume._iid_, CLSCTX_ALL, None)
    volume = cast(interface, POINTER(IAudioEndpointVolume))

    def __init__(self):
        self.root = customtkinter.CTk()
        self.root.geometry('1050x600')
        self.root.title("APx Platform")
        
        # SOUND CONTROL
        self.label1 = customtkinter.CTkLabel(self.root, text="Volume Setting", font=("Nunito",15))
        self.label1.grid(row=1, column=1)
        self.toggleBtn = customtkinter.CTkButton(self.root, border_width=2.5, border_color="red", text_color="red" , text="Mute Off", font=("Ubuntu", 12), command=self.mute)
        self.toggleBtn.grid(row=2, column=3)
        self.var = IntVar()
        self.var(getCurrentMasterVolume())
        self.scale = customtkinter.CTkSlider(self.root, from_=0, to=100, variable=self.var, command=self.setMasterVolume, orientation="horizontal", button_corner_radius=3, button_length=20)
        self.scale.grid(row=1, column=1)
        
    def getCurrentMasterVolume(self):
        return int(round(volume.GetMasterVolumeLevelScalar() * 100))
    
    def displayCurrentVolume(self):
        selection = str(getCurrentMasterVolume()) + "%"
        label.config(text = selection)
    
    def setMasterVolume(self):
        scalarVolume = int(var.get()) / 100
        volume.SetMasterVolumeLevelScalar(scalarVolume, None)
        displayCurrentVolume()
    
    def mute(boolMute):
        sessions = AudioUtilities.GetAllSessions()
        for session in sessions:
            volume = session._ctl.QueryInterface(ISimpleAudioVolume)
            print("volume.GetMute(): %s" % volume.GetMute())
            volume.SetMute(boolMute, None)
        
    def toggle():
        '''
        use
        t_btn.config('text')[-1]
        to get the present state of the toggle button
        '''
        if toggleBtn.configure('text')[-1] == 'Mute Off':
            toggleBtn.configure(text='Mute On')
            mute(1)
        else:
            toggleBtn.configure(text='Mute Off')
            mute(0)
            

app = Myapp()
app.root.mainloop()

When clicked on the button, an error appears as explained above. Can you please fix it as I need this for a project.
Thank You.