diff --git a/src/plainui/jinja2/plainui/channel_events.html.j2 b/src/plainui/jinja2/plainui/channel_events.html.j2
index 380024e30b52235b790d8ec3215fae6ab7875e1b..2f1d431a281d53700a7c3f5a2dc8d0efa51e1fea 100644
--- a/src/plainui/jinja2/plainui/channel_events.html.j2
+++ b/src/plainui/jinja2/plainui/channel_events.html.j2
@@ -57,7 +57,7 @@
           </dd>
         </dl>
         {% if room.next_event %}
-          <div class="">
+          <div>
             <h3 class="py-1 text-white font-sans-serif h3 m-0 mb-2 bg-secondary text-dark text-center">{{ _("Upcoming") }}</h3>
             <dl class="mb-0">
               <dt class="grid-list__item grid-list__item--title">{{ _("Event") }}</dt>
@@ -96,11 +96,11 @@
     <div class="hub-event-overview border mb-3">
       <h3 class="bg-secondary px-3 py-1 text-dark h3 m-0 text-center">{{ _("Room %(room)s", room=room.room.name) }}</h3>
       <div class="hub-event-overview-body p-2">
-        <div class="">
+        <div>
           <p>no running event</p>
         </div>
         {% if room.next_event %}
-          <div class="">
+          <div>
             <h3 class="py-1 text-white font-sans-serif h3 m-0 mb-2 bg-secondary text-dark text-center">{{ _("Upcoming") }}</h3>
             <dl class="mb-0">
               <dt class="grid-list__item grid-list__item--title">{{ _("Event") }}</dt>
diff --git a/src/plainui/jinja2/plainui/components/list_events.html.j2 b/src/plainui/jinja2/plainui/components/list_events.html.j2
index 2ff2534b28bc4542cf8108722edfdab95c98613e..11ef9f8eb1dd9e8931ccfe7be9d6ed977cca0af0 100644
--- a/src/plainui/jinja2/plainui/components/list_events.html.j2
+++ b/src/plainui/jinja2/plainui/components/list_events.html.j2
@@ -202,7 +202,7 @@
 
     <footer class="mt-auto d-flex p-2">
       {% if event.track_name %}
-        <p class="">
+        <p>
           <small class="d-block {{ "text-tertiary" if event.kind == "official" else "text-primary"}}">
             {{ _("%(kind)s Event on Track", kind="Official" if event.kind == "official" else "") }}
           </small>
diff --git a/src/plainui/jinja2/plainui/login.html.j2 b/src/plainui/jinja2/plainui/login.html.j2
index e87fb1c48c8bb8f15b53aaf86f85a511f246de45..e866e0a72931410318ae1d6e1f27466775bce400 100644
--- a/src/plainui/jinja2/plainui/login.html.j2
+++ b/src/plainui/jinja2/plainui/login.html.j2
@@ -18,7 +18,7 @@
       {% if not archive_mode %}
         <form method="POST" id="login" class="hub-landing__form">
           <!--<h1 class="text-center bg-secondary p-2 text-dark h3 m-0">{{ _("login") }}</h1>-->
-          <div class="">
+          <div>
             <input type="hidden" name="next" value="{{ next }}">
 
             {{ csrf_input }}
diff --git a/src/plainui/jinja2/plainui/password_reset_confirm.html.j2 b/src/plainui/jinja2/plainui/password_reset_confirm.html.j2
index 0f819db27a78f940b3ae2c7e62a76ef25cf05931..d50a50e808c8805acb7514f33ed3c967592dc41f 100644
--- a/src/plainui/jinja2/plainui/password_reset_confirm.html.j2
+++ b/src/plainui/jinja2/plainui/password_reset_confirm.html.j2
@@ -13,7 +13,7 @@
 
     <form method="POST" id="login-change" class="mw-664 hub-landing__form">
       <!--<h1 class="text-center bg-secondary p-3 text-dark h3">{{ _("enter new password") }}</h1>-->
-      <div class="">
+      <div>
         <input type="hidden" name="next" value="{{ next }}">
         {{ csrf_input }}
         {{ form_elements.password(form, 'new_password1') }}
diff --git a/src/plainui/jinja2/plainui/profile.html.j2 b/src/plainui/jinja2/plainui/profile.html.j2
index 2dff878846ce6e7d786a431df2ea5e883dd42156..eb58f7416e892d62a792284418c3d79843b22d5d 100644
--- a/src/plainui/jinja2/plainui/profile.html.j2
+++ b/src/plainui/jinja2/plainui/profile.html.j2
@@ -29,7 +29,7 @@
     </div>
 
     <form method="POST" class="hub-card">
-      <div class="">
+      <div>
         <h2 class="hub-section-title">{{ _("custom preferences") }}</h2>
         <div>
           {{ csrf_input }}
@@ -58,7 +58,7 @@
         <div>
           <h2 class="font-sans-serif m-1 m-0">{{ _("Manage Badges") }}</h2>
           {% if amount_badges_not_accepted > 0 %}
-            <p class="">
+            <p>
               {{ _("Pending badges") }}: <a class="a a-bold" href="{{ url('plainui:manage_badges') }}">{{ amount_badges_not_accepted }}</a>
             </p>
           {% endif %}
diff --git a/src/plainui/jinja2/plainui/registration/password_reset_form.html.j2 b/src/plainui/jinja2/plainui/registration/password_reset_form.html.j2
index 501bc51766d7fca9c3450325768a094dfbb18526..f9b4427dc94853df6110d034072c3c2f5b29a7c3 100644
--- a/src/plainui/jinja2/plainui/registration/password_reset_form.html.j2
+++ b/src/plainui/jinja2/plainui/registration/password_reset_form.html.j2
@@ -13,7 +13,7 @@
     <h1 class="text-center hub-landing__title">{{ _("reset password") }}</h1>
 
     <form method="POST" id="login-reset" class="mw-664 hub-landing__form">
-      <div class="">
+      <div>
         {% if retry %}
           <ul class="list-unstyled text-left mb-2">
             <li class="d-block text-danger">
diff --git a/src/plainui/jinja2/plainui/signup.html.j2 b/src/plainui/jinja2/plainui/signup.html.j2
index 6c603dbe30c73bb26c9928912b680c650f116be0..db585424de13f568ca0a4721cea665570d026bf1 100644
--- a/src/plainui/jinja2/plainui/signup.html.j2
+++ b/src/plainui/jinja2/plainui/signup.html.j2
@@ -16,7 +16,7 @@
 
     {% if not archive_mode %}
       <form method="POST" id="registration" class="mw-664 hub-landing__form">
-        <div class="">
+        <div>
           <input type="hidden" name="next" value="{{ next }}">
 
           {{ csrf_input }}
diff --git a/src/plainui/static/error_pages/403.html b/src/plainui/static/error_pages/403.html
index 3dc29f434253ee93493fc30f5d20b68878e2258a..86d4a51bb6d50879fcc412bd08463d2400e582bc 100644
--- a/src/plainui/static/error_pages/403.html
+++ b/src/plainui/static/error_pages/403.html
@@ -31,7 +31,7 @@
   </head>
   <body>
     <article>
-      <img class="" src="403.svg" alt="403 - Forbidden" title="403 - Forbidden" />
+      <img src="403.svg" alt="403 - Forbidden" title="403 - Forbidden" />
     </article>
   </body>
 </html>
diff --git a/src/plainui/static/error_pages/404.html b/src/plainui/static/error_pages/404.html
index 3eabccd38345abd82060ace907b1dc9d0f02277a..909c29e5628431616236cb5593ccf553b47ddbed 100644
--- a/src/plainui/static/error_pages/404.html
+++ b/src/plainui/static/error_pages/404.html
@@ -31,7 +31,7 @@
   </head>
   <body>
     <article>
-      <img class="" src="404.svg" alt="404 Error" title="404 Error" />
+      <img src="404.svg" alt="404 Error" title="404 Error" />
     </article>
   </body>
 </html>
diff --git a/src/plainui/static/error_pages/500.html b/src/plainui/static/error_pages/500.html
index 125def779ec16b9d64bb8d7ae2f754f815b85a4e..a7c3e5bceb3643d0398068103b0e729f6dc4bcca 100644
--- a/src/plainui/static/error_pages/500.html
+++ b/src/plainui/static/error_pages/500.html
@@ -31,8 +31,7 @@
   </head>
   <body>
     <article>
-      <img class=""
-           src="500.svg"
+      <img src="500.svg"
            alt="500 - internal Server error"
            title="500 - internal Server error" />
     </article>
diff --git a/src/plainui/templates/403.html b/src/plainui/templates/403.html
index 23f9e86820e93fc4dbe5d528db88e3c211d37acd..49548cc55e9967b6046e0dbae82b70bfdfb3b895 100644
--- a/src/plainui/templates/403.html
+++ b/src/plainui/templates/403.html
@@ -33,7 +33,7 @@
   <body>
     <article>
       <a href="{% hub_absolute "plainui:index" %}" class="row my-8">
-        <img class="" src="{% static "error_pages/403.svg" %}" alt="403 - Forbidden" title="403 - Forbidden" />
+        <img src="{% static "error_pages/403.svg" %}" alt="403 - Forbidden" title="403 - Forbidden" />
       </a>
     </article>
   </body>
diff --git a/src/plainui/templates/404.html b/src/plainui/templates/404.html
index 7ab1dc90cfcedf326b55e3b0baa4f622842d5df2..41f97f4432040b709c9a6bf41c2f3665d7190b23 100644
--- a/src/plainui/templates/404.html
+++ b/src/plainui/templates/404.html
@@ -33,7 +33,7 @@
   <body>
     <article>
       <a href="{% hub_absolute "plainui:index" %}" class="row my-8">
-        <img class="" src="{% static "error_pages/404.svg" %}" alt="404 Error" title="404 Error" />
+        <img src="{% static "error_pages/404.svg" %}" alt="404 Error" title="404 Error" />
       </a>
     </article>
   </body>
diff --git a/src/plainui/templates/500.html b/src/plainui/templates/500.html
index 4f13dae2b1642f47a58a3c4cace2658325c8600c..d683c1a8ca637f660e91e1cd989ea42f26479ad9 100644
--- a/src/plainui/templates/500.html
+++ b/src/plainui/templates/500.html
@@ -33,7 +33,7 @@
   <body>
     <article>
       <a href="{% hub_absolute "plainui:index" %}" class="row my-8">
-        <img class="" src="{% static "error_pages/500.svg" %}" alt="500 - internal Server error" title="500 - internal Server error" />
+        <img src="{% static "error_pages/500.svg" %}" alt="500 - internal Server error" title="500 - internal Server error" />
       </a>
     </article>
   </body>