diff --git a/scripts/function/permission/libreportal_folders.sh b/scripts/function/permission/libreportal_folders.sh
index 44df614..aafe379 100755
--- a/scripts/function/permission/libreportal_folders.sh
+++ b/scripts/function/permission/libreportal_folders.sh
@@ -25,7 +25,8 @@ reconcileDockerOwnership()
     # The control plane is owned by the MANAGER user in BOTH modes. root:root was
     # never the intended model — it only ever showed up as an artifact of
     # un-de-sudo'd commands (sudo creating files as root instead of libreportal).
-    local owner="$sudo_user_name"
+    local owner="${sudo_user_name:-libreportal}"
+    local appusr="${docker_install_user:-$CFG_DOCKER_INSTALL_USER}"
 
     # Swap ONLY the owner on our own control-plane files; never reset mode bits
     # (so nothing that validates its permissions gets surprised). The only two
@@ -52,7 +53,7 @@ reconcileDockerOwnership()
     local webui_dir="${containers_dir}libreportal"
     if [[ -d "$webui_dir" ]]; then
         local app_owner="$owner"
-        [[ "$mode" == "rootless" ]] && app_owner="$docker_install_user"
+        [[ "$mode" == "rootless" ]] && app_owner="$appusr"
         runSystem chown -R "$app_owner:$app_owner" "$webui_dir"
     fi