Try alternative when creating directories.

hetzner.yaml

@@ -13,19 +13,10 @@
         path: "{{ backup_dir }}"
         state: directory
 
-    - name: Check if directories exist
+    - name: Check if customer directories exist
-      stat:
+      file:
         path: "{{ backup_dir }}/{{ item.key }}"
-      register: dirs
+        state: directory
       loop: "{{ lookup('dict', customers) }}"
       loop_control:
         label: "{{ item.key }}"
-
-    - debug: var=dirs
-
-    - name: Create not existing directories
-      debug: var=item.invocation.module_args.path
-      when: item.stat.exists == false
-      with_items: "{{ dirs.results }}"
-      loop_control:
-        label: "{{ item.item }}"