_layouts/page.html in jekyll-theme-chirpy-4.1.1 vs _layouts/page.html in jekyll-theme-chirpy-4.2.0

@@ -8,10 +8,10 @@
     <div id="page" class="post pb-5 pl-1 pr-1 pl-sm-2 pr-sm-2 pl-md-4 pr-md-4 mb-md-4">
     {% if page.dynamic_title %}
       <h1 class="dynamic-title">
         {% if page.collection == 'tabs' %}
           {%- capture tab_key -%}{{ page.url | split: '/' }}{%- endcapture -%}
-          {{- site.data.locales[site.lang].tabs[tab_key] | default: page.title -}}
+          {{- site.data.locales[lang].tabs[tab_key] | default: page.title -}}
         {% else %}
           {{- page.title -}}
         {% endif %}
       </h1>
       <div class="post-content">