Landing Demo - Clickable clients section

<div class="section-clients">
<div class="container">
<div class="row">
<div class="col-lg-8 col-md-7 d-flex align-items-lg-center flex-row">
<div class="col"><img src="demos/conference/images/sponcors/amazon.svg" alt="Clients"></div>
<div class="col"><img src="demos/conference/images/sponcors/netflix.svg" alt="Clients"></div>
<div class="col"><img src="demos/conference/images/sponcors/google.svg" alt="Clients"></div>
<div class="col"><img src="demos/conference/images/sponcors/linkedin.svg" alt="Clients"></div>
</div>
</div>
</div>
</div>
</div>
</section>

Hi how can I make these clickable, when changing to
<div class="col"><a href="https://amazon.com"><img src="demos/conference/images/sponcors/amazon.svg" alt="Clients" /></a></div>
It's unable to be clicked.