Do not load image gif

I tried exactly the same image with the difference that locally and with a url and it worked for me, but when trying out your code I had the same problem, so I modified it a bit, this is your code:

<div id="cargando"><img src="/images/822.gif"/>
  <h5>  Ejecutando...</h5>
</div>

But I made a small modification:

I have created the same folder and have taken the first / that is within src of the img tag leaving it as below:

<div id="cargando"><img src="images/822.gif"/>
  <h5>  Ejecutando...</h5>
</div>

And it has worked for me, you tell me how you are doing

As you can see in the example, your code works perfectly well

<div id="cargando"><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Rotating_earth_%28large%29.gif/200px-Rotating_earth_%28large%29.gif"/>
  <h5>  Ejecutando...</h5>
</div>

<img src="https://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Rotating_earth_%28large%29.gif/200px-Rotating_earth_%28large%29.gif" alt="Funny image">