Locandina_theMDB= "https://image.tmdb.org/t/p/w500/tBi5xW9Rd0YoGB0aAggV0EN5LDP.jpg"

CODE:
            app.send_media_group(Destinatario, [InputMediaPhoto(Sfondo_imdb_1,     caption= Trama_imdb),
                                                InputMediaPhoto(Locandina_imdb,    caption= Dati_imdb),
                                                InputMediaPhoto(Locandina_omdb,    caption= Dati_theMDb),
                                                InputMediaPhoto(Locandina_theMDB,  caption= Trama_theMDB)])
ERROR:
Traceback (most recent call last):
  File "/home/pi/completi/completo.py", line 698, in <module>
    InputMediaPhoto(Locandina_theMDB,  caption= Trama_theMDB)])
  File "/home/pi/.local/lib/python3.7/site-packages/pyrogram/sync.py", line 56, in async_to_sync_wrap
    return loop.run_until_complete(coroutine)
  File "/usr/lib/python3.7/asyncio/base_events.py", line 584, in run_until_complete
    return future.result()
  File "/home/pi/.local/lib/python3.7/site-packages/pyrogram/methods/messages/send_media_group.py", line 112, in send_media_group
    url=i.media
  File "/home/pi/.local/lib/python3.7/site-packages/pyrogram/methods/advanced/send.py", line 81, in send
    else self.sleep_threshold)
  File "/home/pi/.local/lib/python3.7/site-packages/pyrogram/session/session.py", line 425, in send
    return await self._send(data, timeout=timeout)
  File "/home/pi/.local/lib/python3.7/site-packages/pyrogram/session/session.py", line 395, in _send
    RPCError.raise_it(result, type(data))
  File "/home/pi/.local/lib/python3.7/site-packages/pyrogram/errors/rpc_error.py", line 83, in raise_it
    is_unknown=False)
pyrogram.errors.exceptions.bad_request_400.WebpageMediaEmpty: [400 WEBPAGE_MEDIA_EMPTY]: The URL doesn't contain any valid media (caused by "messages.UploadMedia")

CODE:
app.send_photo(Destinatario, Locandina_theMDB,  caption= Trama_theMDB)

NO RETURN ERROR.