Long story short

Aiohttp failing to get response on awaited urls

    allUrls = await getAllUrls(a, b, c);
    urls = ['url1', 'url3'];
    result = await fetchAll(session, tasks, urls);
    return json(result);

When using awaited allUrls I am getting the following error
aiohttp.client_exceptions.ContentTypeError: 0, message='Attempt to decode JSON with unexpected mimetype: '

When I hardcode the urls (by printing them previously) in the variable urls, it gives the expected output

Expected behaviour

It should be same in both cases. I am dynamically generating the urls and I might be missing something really basic.