如何正确导入图像到Tkinter中的界面

我正在用python制作照相亭。我正在使用tkinter来做到这一点：

from tkinter import \*        from tkinter import font
import os
from PIL import Image
from PIL import ImageTk
load = Image.open("./image1.jpg")

def startCallBack():
    tf = Tk()
    render = ImageTk.PhotoImage(load)
    img = Label(tf, image=render)
    img.image = render
    img.pack()
    root.destroy()
    tf.mainloop()

root = Tk()

appHighlightFont = font.Font(family='Helvetica', size=48, weight='bold')
label=Label(root, text='PHOTO BOOTH', font=appHighlightFont)
btn = Button( root, text ="START", command = startCallBack )
label.place(relx=0.5, rely=0.4,anchor="center")
btn.place(relx=0.5, rely=0.6,anchor="center")
root.mainloop()

但是，当我启动此脚本时，出现错误：

Exception in Tkinter callback
Traceback (most recent call last):
File "/usr/lib/python3.7/tkinter/__init__.py", line 1705, in __call__
return self.func(\*rgs)
File "photobooth.py", line 10, in startCallBack
img = Label(tf, image=render)
File "/usr/lib/python3.7/tkinter/__init__.py", line 2766, in __init__
Widget.__init__(self, master, 'label', cnf, kw)
File "/usr/lib/python3.7/tkinter/__init__.py", line 2299, in __init__
(widgetName, self._w) + extra + self._options(cnf))
_tkinter.TclError: image "pyimage1" doesn't exist

图像与脚本位于同一目录中，我正在使用Raspberry Pi 4B 4GB RAM

请帮忙！

问题来源：stackoverflow