Update to 2022-02-22 18:00

roles/bookstack/templates/env.j2

@@ -27,3 +27,7 @@ QUEUE_CONNECTION=database
 {% for key in bookstack_settings.keys() | list %}
 {{ key }}="{{ bookstack_settings[key] }}"
 {% endfor %}
+{% if bookstack_pdf_exporter == 'wkhtmltopdf' %}
+WKHTMLTOPDF=/usr/local/bin/wkhtmltopdf
+ALLOW_UNTRUSTED_SERVER_FETCHING=true
+{% endif %}