In the head above all is:
<script src="https://api-maps.yandex.ru/2.1?apikey=my_key" type="text/javascript"></script>
The following are standard actions from examples
<div id="map"> </div>
I can’t figure out what’s wrong, I haven’t written my own code, I took everything from examples
Answer 1
<script src="https://api-maps.yandex.ru/2.1/?apikey=<yourAPI-key>&lang=ru_RU"></script>