This post gives you a snippet to get the URL path of an entity reference in Twig

{% for trend in paragraph.field_trend_reference %}
   {% if trend.entity.id %}
      <a href="{{ path('entity.node.canonical', {'node':  trend.entity.id}) }}" target="_blank" class="trends-item" style="background-image:url('{{file_url(trend.entity.field_overview_image_small.0.entity.uri.value)}}');background-size:cover;background-repeat:no-repeat;">
         <h4>{{ trend.entity.label }}</h4>
      </a>
   {% endif %}
{% endfor %}

 

 

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