Fix retry button on error 500 page

CHANGELOG.rst

@@ -33,6 +33,7 @@ Fixed
 * The `Stop Impersonation` button is not shown due to an oversee when changing the type of the whoAmI query to an object of UserType
 * Offline fallback page for legacy pages was misleading sometimes.
 * Route changes in the Legacy-Component iframe didn't trigger a scroll to the top
+* Retry button on error 500 page did not trigger a reload of the page.
 
 `3.0b3`_ - 2023-03-19
 ---------------------

aleksis/core/templates/500.html

@@ -16,7 +16,7 @@
           {% endblocktrans %}
         </p>
         {% include "core/partials/admins_list.html" %}
-        <a href="javascript:window.location.reload()" class="btn green waves-effect waves-light">
+        <a onClick="window.location.reload();" class="btn secondary waves-effect waves-light">
           <i class="material-icons left">refresh</i>
           {% trans "Retry" %}
         </a>