problem in an async tkinter app 'PhotoImage' object has no attribute '_PhotoImage__photo'

I exactly followed your example codes but not working inside my async Tkinter app... you example files works fine but don't working inside my app... is there a compatibility problem with async_tkinter_loop?

This is how I add your widget just after my other widgets
map_widget = tkintermapview.TkinterMapView(root, width=200, height=200, corner_radius=0) map_widget.pack() map_widget.set_position(48.860381, 2.338594) # Paris, France map_widget.set_zoom(15)

Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PIL/ImageTk.py", line 146, in del
name = self.__photo.name
AttributeError: 'PhotoImage' object has no attribute '_PhotoImage__photo'
Exception ignored in: <function PhotoImage.del at 0x7f831923b0e0>
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PIL/ImageTk.py", line 146, in del
name = self.__photo.name
AttributeError: 'PhotoImage' object has no attribute '_PhotoImage__photo'
Exception ignored in: <function PhotoImage.del at 0x7f831923b0e0>
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PIL/ImageTk.py", line 146, in del
name = self.__photo.name
AttributeError: 'PhotoImage' object has no attribute '_PhotoImage__photo'
Exception ignored in: <function PhotoImage.del at 0x7f831923b0e0>
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PIL/ImageTk.py", line 146, in del
name = self.__photo.name
AttributeError: 'PhotoImage' object has no attribute '_PhotoImage__photo'
Exception ignored in: <function PhotoImage.del at 0x7f831923b0e0>
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PIL/ImageTk.py", line 146, in del
name = self.__photo.name
AttributeError: 'PhotoImage' object has no attribute '_PhotoImage__photo'
Exception ignored in: <function PhotoImage.del at 0x7f831923b0e0>
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PIL/ImageTk.py", line 146, in del
name = self.__photo.name
AttributeError: 'PhotoImage' object has no attribute '_PhotoImage__photo'
Exception ignored in: <function PhotoImage.del at 0x7f831923b0e0>
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PIL/ImageTk.py", line 146, in del
name = self.__photo.name
AttributeError: 'PhotoImage' object has no attribute '_PhotoImage__photo'
Exception ignored in: <function PhotoImage.del at 0x7f831923b0e0>
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PIL/ImageTk.py", line 146, in del
name = self.__photo.name
AttributeError: 'PhotoImage' object has no attribute '_PhotoImage__photo'
Exception ignored in: <function PhotoImage.del at 0x7f831923b0e0>
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PIL/ImageTk.py", line 146, in del
name = self.__photo.name
AttributeError: 'PhotoImage' object has no attribute '_PhotoImage__photo'
Exception ignored in: <function PhotoImage.del at 0x7f831923b0e0>
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PIL/ImageTk.py", line 146, in del
name = self.__photo.name
AttributeError: 'PhotoImage' object has no attribute '_PhotoImage__photo'

Start by reproducing the reported snippet inside an async_tkinter_loop application and compare it with the working example files. Trace the PIL.ImageTk.PhotoImage cleanup error and check how the widget, Tkinter, and the async loop interact. Done means the map widget runs in the reported async setup without the PhotoImage exception.