Tkinter json.decoder.JSONDecodeError

Question

here is my code it is meant to store the data into a json file

from tkinter import *
from tkinter import messagebox
import pyperclip
import json
# ---------------------------- PASSWORD GENERATOR ------------------------------- #
import random
def password_generator():
    letters = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z']
    numbers = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
    symbols = ['!', '#', '$', '%', '&', '(', ')', '*', '+']

    nr_letters = random.randint(8, 10)
    nr_symbols = random.randint(2, 4)
    nr_numbers = random.randint(2, 4)

    password_list = []

    for char in range(nr_letters):
      password_list.append(random.choice(letters))

    for char in range(nr_symbols):
      password_list += random.choice(symbols)

    for char in range(nr_numbers):
      password_list += random.choice(numbers)



    random.shuffle(password_list)

    password = ""
    for char in password_list:
      password += char
    passinput.delete(0,END)
    passinput.insert(0, password)
    pyperclip.copy(password)
# --------------sbh-------------- SAVE PASSWORD ------------------------------- #
def save():
    get_web=webinput.get()
    get_pass=passinput.get()
    get_mail=emailinput.get()
    new_data={
        get_web: {
            "email": get_mail,
            "password":get_mail
        }
    }


    if len(get_web) and len(get_mail) and len(get_pass) != 0:
        is_ok= messagebox.askokcancel(title="Website", message=f"These are the details you entered: \nEmail:{get_mail}"
                                                        f"\n Website: {get_web} \n Password: {get_pass} \n  is it ok to save?")

        if is_ok:
            try:
                with open("data.json","r") as data_file:
                    data = json.load(data_file)

            except FileNotFoundError:
                with open("data.json", "w") as data_file:
                    json.dump(new_data, data_file, indent=4)
            else:
                data.update(new_data)
                with open("data.json", "w") as data_file:
                    json.dump(data, data_file, indent=4)
            finally:
                webinput.delete(0, END)
                passinput.delete(0, END)


    elif len(get_web) or len(get_mail) or len(get_pass) == 0:
        messagebox.showinfo(title="Error", message="Dont leave any of the field empty")
# ---------------------------- UI SETUP ------------------------------- #
window= Tk()
window.title("Password Generator")
window.minsize(width=500, height=500)
window.config(padx=20,pady=20,bg="#B1DDC6")
my_img= PhotoImage(file="logo.png")
canvas=Canvas(height=200,width=200)
canvas.create_image(100,100,image=my_img)
canvas.grid(column=1, row=0)

webtext=Label(text="Website:")
webtext.grid(column=0,row=1)
webinput=Entry(width=35)
webinput.focus()
webinput.grid(column=1, row=1, columnspan=2)

webemail=Label(text="Email/Username:")
webemail.grid(column=0, row=2)
emailinput=Entry(width=35)
emailinput.insert(END,string="ayodeledanny4@gmail.com")
emailinput.grid(column=1, row=2, columnspan=2)

passtext=Label(text="Password:")
passtext.grid(column=0,row=3)
passinput=Entry(width=21)
passinput.grid(column=1,row=3)

generate_button=Button(text="Generate Password", command=password_generator)
generate_button.grid(column=2,row=3)

add_button=Button(text="Add", width=36, command=save)
add_button.grid(column=1,row=4,columnspan=2)




window=mainloop()

and here is my error

/usr/local/bin/python3.11 /Users/user/Downloads/python projects/password-manager-start/main.py 
Exception in Tkinter callback
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/tkinter/__init__.py", line 1948, in __call__
    return self.func(*args)
           ^^^^^^^^^^^^^^^^
  File "/Users/user/Downloads/python projects/password-manager-start/main.py", line 57, in save
    data = json.load(data_file)
           ^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/json/__init__.py", line 293, in load
    return loads(fp.read(),
           ^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Process finished with exit code 0