Adding debug statements. Union did not work for "array + string". I thought they were both arrays.

tasks/workstation/settings/gnome.yml

@@ -65,14 +65,23 @@
 - name: Workstation | Account Management | GNOME | Dash To Dock | Array This Extension Name
   set_fact: 
     dash_to_dock_ext_name: ['dash-to-dock@micxgx.gmail.com']
-  when: dash_to_dock_exists.failed
+    gnome_enabled_extensions_list: {{ gnome_enabled_extensions.value }} # Hopefully converts from String to Array??
+  when: gnome_enabled_extensions is defined
 
 # https://ansible-docs.readthedocs.io/zh/stable-2.0/rst/playbooks_filters.html#filters-for-formatting-data
 
+- debug:
+    var: dash_to_dock_ext_name
+  when: gnome_enabled_extensions is defined
+
+- debug:
+    var: gnome_enabled_extensions_list
+  when: gnome_enabled_extensions is defined
+
 - name: Workstation | Account Management | GNOME | Dash To Dock | Union Arrays To Enable
   dconf: 
     key: /org/gnome/shell/enabled-extensions
-    value: "{{ gnome_enabled_extensions.value | union(dash_to_dock_ext_name) }}"
+    value: "{{ gnome_enabled_extensions_list | union(dash_to_dock_ext_name) }}"
     state: present
   become_user: ling
   when: gnome_enabled_extensions is defined