Template error:
<!-- Page content wrapper-->
<div id="page-content-wrapper">
<!-- Top navigation-->
<nav class="navbar navbar-expand-lg navbar-light bg-light border-bottom">
<div class="container-fluid">
{% if request.user.is_authenticated %}
<p> Hola! {{request.user.first_name}} </p>
<img height="50px" src={{avatar}}>
<img height="15px" src={{(Avatar.objects.filter(user = request.user.id)[0].imagen.url)}}>
{% else %}
<p> Hola Visitante! </p>
{% endif %}