minor update

layouts/events/single.html

         </h4>
         {{ range .Params.event_speakers }}
           <div class="mb-2">
+            {{with .speaker_image}}
             <div class="client-thumb speaker">
               <img class="img-fluid lozad" data-src="/images/client/client-1.webp" onerror="this.onerror=null;this.src='\/images\/client\/client-1.jpg'" alt="Lemos Kail" src="/images/client/client-1.webp" data-loaded="true">
             </div>
+            {{end}}
             <div class="bio">{{.speaker_name}}, {{.bio}}</div>
           </div>
         {{end}}

layouts/events/upcoming.html

 <article class="col-lg-4 col-md-6 col-12 clearfix wow fadeInUp mb-4" data-wow-duration="500ms">
     <div class="post-block">
+      {{with .Params.Image_webp}}
       <div class="media-wrapper">
         <img class="img-fluid lozad" data-src="{{ .Params.Image_webp | absURL }}" onerror="this.onerror=null;this.src='{{ .Params.Image | absURL }}'">
       </div>
+      {{end}}
       <div class="content">
         <h3><a href="{{ .Permalink }}">{{ .Title }}</a></h3>
         <p>{{ .Summary }}</p>