Ошибка derpygui в python

 import socket 
from paramiko.client import SSHClient 
import dearpygui.dearpygui as dpg 
 
dpg.create_context() 
 
window_width = 1000 
window_height = 600 
server_session = None 
 
dpg.create_viewport(title="SSH MANAGER", decorated=False) 
dpg.configure_viewport(0, x_pos=100, y_pos=100, width=window_width, height=window_height) 
dpg.set_viewport_min_width(window_width) 
dpg.set_viewport_min_height(window_height) 
 
with dpg.font_registry(): 
    default_font = dpg.add_font("custom.ttf", size=20) 
    custom_font = dpg.add_font("custom.ttf", size=50) 
 
with dpg.window(no_collapse=True, no_resize=True, no_close=True, 
                no_title_bar=True, tag="main_w") as main_menu_window: 
    with dpg.group(horizontal=True): 
        title = dpg.add_text( 
            default_value="SSH MANAGER", 
            pos=[window_width // 2 - 200, window_height // 2 - 100] 
        ) 
        dpg.bind_item_font(title, custom_font) 
 
 
dpg.set_primary_window(window=main_menu_window, value=True) # TODO 1 
dpg.setup_dearpygui() 
dpg.show_viewport() 
dpg.start_dearpygui() 
dpg.destroy_context() 

 Exception: Error: [1000] Message: 	Font file could not be found 
 
The above exception was the direct cause of the following exception: 
 
Traceback (most recent call last): 
  File "C:\Users\Yaros\PycharmProjects\MySofts\Soft1\main.py", line 17, in <module> 
    default_font = dpg.add_font("custom.ttf", size=20) 
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
  File "C:\Users\Yaros\PycharmProjects\MySofts\.venv\Lib\site-packages\dearpygui\dearpygui.py", line 4341, in add_font 
    return internal_dpg.add_font(file, size, label=label, user_data=user_data, use_internal_label=use_internal_label, tag=tag, pixel_snapH=pixel_snapH, parent=parent, **kwargs) 
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
SystemError: <built-in function add_font> returned a result with an exception set