.product-row is rather harmful here

pretix_public_registrations/templates/pretix_public_registrations/front_page.html

 {% load i18n %}
 <section class="front-page">
     <h3>{% trans "Public registrations" %}</h3>
-    <div class="table-responsive product-row">
+    <div class="table-responsive">
     <table class="table table-striped">
         <thead>
             <tr>