Nintex templates download as I was investigating some issue with their search bar. In the header file, if you have multiple '<input' (like we would normally do for language switcher options) it negates the button being clickable at all.

Custom_Templates/customer_templates/Nintex University/private_certificate.html.liquid

@@ -0,0 +1,34 @@
+{% include "header"
+  , color: "var(--nintex--color--deep-purple)"
+  , text_color: "white"
+  , text_en_US: ""
+  , text_es: ""
+  , text_fr: ""
+  , text_de: ""
+  , text_en_GB: ""
+  , text_nl: ""
+  , text_pt_BR: ""
+  , subtitle_en_US: ""
+  , subtitle_es: ""
+  , subtitle_fr: ""
+  , subtitle_de: ""
+  , subtitle_en_GB: ""
+  , subtitle_nl: ""
+  , subtitle_pt_BR: ""
+  , button_text_en_US: ""
+  , button_text_es: ""
+  , button_text_fr: ""
+  , button_text_de: ""
+  , button_text_en_GB: ""
+  , button_text_nl: ""
+  , button_text_pt_BR: ""
+  , button_link: "" %}
+{% include "certificates_top_bar" %}
+<main class="np-main np-certificate np-max-width np-page-container clear-main-spacings">
+  <section class="np-certificate-content-spacing">
+    <div class="row">
+      {% include "certificates_preview" %}
+      {% include "certificates_info_column" %}
+    </div>
+  </section>
+</main>