Python and pytube getting a 'streamingData' error when trying to run

I'm been fighting with this for a while. I wrote a small front end for a YouTube downloader using pytube. For some reason, I get a 'streamingData' error every time I try to download a video. I tried several different ways of getting streams, but can't get it to work. I put in a few print statements and basically, the YouTube link is correct, but then it doesn't get to the if statement on line 14 and bombs out at the video = yt_object.streams.get_highest_resolution() on line 13 throwing the exception error of 'streamingData'. I'm running the latest version of pytube (12.1.3). My source code is:

    import os
    import tkinter
    import customtkinter
    from pytube import YouTube
    
    
    def start_download():
        try:
            yt_link = link.get()
            print(yt_link)
            yt_object = YouTube(yt_link, on_progress_callback=on_progress)
            print(1)
            video = yt_object.streams.get_highest_resolution()
            if video:
                print(2)
                title.configure(text=yt_object.title, text_color="white")
                print(3)
                finish_label.configure(text="")
                print(4)
                video.download(output_path=f"{os.environ['UserProfile']}/Downloads")
                print(5)
                finish_label.configure(text='Download complete.')
            else:
                print("No highest resolution stream available.")
        except Exception as e:
            finish_label.configure(text=f"An error occurred: {e}", text_color="red")
    
    
    def on_progress(stream, chunk, bytes_remaining):
        total_size = stream.filesize
        bytes_downloaded = total_size - bytes_remaining
        percentage_of_completion = bytes_downloaded / total_size * 100
        per = str(int(percentage_of_completion))
        progress_percentage.configure(text=f"{per}%")
    
        # Update progress bar
        progress_bar.set(float(percentage_of_completion / 100))
    
    
    # System Settings
    customtkinter.set_appearance_mode("Dark")
    customtkinter.set_default_color_theme("blue")
    
    # Create the app frame
    app = customtkinter.CTk()
    app.geometry("720x480")
    app.title("YouTube Downloader")
    
    # Adding UI elements
    title = customtkinter.CTkLabel(app, text="Insert a YouTube link:")
    title.pack(padx=10, pady=10)
    
    # Link input
    url_var = tkinter.StringVar()
    link = customtkinter.CTkEntry(app, width=350, height=40, textvariable=url_var)
    link.pack()
    
    # Finished downloading
    finish_label = customtkinter.CTkLabel(app, text="")
    finish_label.pack()
    
    # Progress percentage
    progress_percentage = customtkinter.CTkLabel(app, text="0%")
    progress_percentage.pack()
    
    progress_bar = customtkinter.CTkProgressBar(app, width=400)
    progress_bar.set(0)
    progress_bar.pack(padx=10, pady=10)
    
    # Download button
    download = customtkinter.CTkButton(app, text="Download", command=start_download)
    download.pack(padx=10, pady=10)
    
    # Run app
    app.mainloop()

Any thoughts or suggestions would be welcome! I even asked ChatGPT for help to no avail.

In following ewokx's recommendations, it throws this error:

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Users\Robert\AppData\Local\Programs\Python\Python311\Lib\tkinter\__init__.py", line 1948, in __call__
    return self.func(*args)
           ^^^^^^^^^^^^^^^^
  File "C:\Users\Robert\PycharmProjects\YouTubeDownloader\venv\Lib\site-packages\customtkinter\windows\widgets\ctk_button.py", line 553, in _clicked
    self._command()
  File "C:\Users\Robert\PycharmProjects\YouTubeDownloader\main.py", line 12, in start_download
    video = yt_object.streams.get_highest_resolution()
            ^^^^^^^^^^^^^^^^^
  File "C:\Users\Robert\PycharmProjects\YouTubeDownloader\venv\Lib\site-packages\pytube\__main__.py", line 296, in streams
    return StreamQuery(self.fmt_streams)
                       ^^^^^^^^^^^^^^^^
  File "C:\Users\Robert\PycharmProjects\YouTubeDownloader\venv\Lib\site-packages\pytube\__main__.py", line 176, in fmt_streams
    stream_manifest = extract.apply_descrambler(self.streaming_data)
                                                ^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Robert\PycharmProjects\YouTubeDownloader\venv\Lib\site-packages\pytube\__main__.py", line 161, in streaming_data
    return self.vid_info['streamingData']
           ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
KeyError: 'streamingData'

I was able to figure it out. Basically, YouTube (well, the channel uploaders) mark most videos as 18+ and that causes PyTube to crap the bed. So, you need to set up authorization for the app to allow it to work. To fix this issue, I needed to add/change the following line:

yt_object = YouTube(yt_link, on_progress_callback=on_progress, use_oauth=True, allow_oauth_cache=True)

Now, the problem is that it send the auth dialog to the console and I can't figure out how to capture the code and display it in the GUI so I can make it a stand alone program...but that's another battle.

Thanks to ewokx for trying to help!