No errors synchronously, asynchronously - WRONG SSL VERSION NUMBER. How to fix it?

Question

Python

Problem with calling Google Drive API

Synchronous call does not throw any errors:

def backup_everything(*bases):
    tasks = [
        i.backup()
        for i in bases
    ]

Result:


Async gives an SSL certificate error (as well as multithreading via unsync, by the way):

async def backup_coro(*bases):
    loop = asyncio.get_event_loop()
    tasks = [
        loop.run_in_executor(None, i.backup)
        for i in bases
    ]
    return await asyncio.gather(*tasks)

asyncio.run(backup_coro(*bases))

Result:


The backup() methods of different classes refer to the function of the same name:

def backup(f_name: str,  f_path: str) -> None:
    # удалить старые версии файлов
    last_backup = drive.search({'name': f_name})
    if last_backup:
        del_item(last_backup[0]['id'], "Previous base deleted")
    try:
        # ID папки, куда заливать файл
        fold_id = folder(BACKUP_FOLDER_NAME)
        f_mime_type = mimeTypes[file_ext(f_name)]
        drive.upload_file(f_name, f_path, f_mime_type, fold_id)
    except Exception as trouble:
        print(trouble, f_path, 'Terminating...', sep='\n')
    else:
        print(f"File: '{f_name}' uploaded")

Which, in turn, refers to the class methods for working with the Google Drive API.

The method where the error occurs:

def del_item(self, _id: str) -> None:
        self.drive_service.files().delete(fileId=_id).execute()

Where drive_service is googleapiclient.discovery.build('drive', 'v3', credentials). Nothing out of the ordinary, in other words.

Question(s): Why is this happening? How to fix it? Do Google libraries have more elegant ways to work asynchronously?