fix: privileged webdav falls back to global storage

user_webdav.go

@@ -108,7 +108,12 @@ func (a *App) storageForTask(t *Task) (RemoteStorage, string, bool) {
 	}
 	var cfg WebDAVConfig
 	if a.db.Where("user_id = ? AND enabled = ?", user.ID, true).First(&cfg).Error != nil || cfg.URL == "" {
+		// Privileged users fall back to the global WebDAV until a custom
+		// WebDAV configuration is enabled and tested successfully.
+		if a.cfg.WebDAVURL == "" || a.storage == nil {
 			return nil, "", false
 		}
+		return a.storage, a.cfg.WebDAVPath, true
+	}
 	return NewWebDAVStorage(Config{WebDAVURL: cfg.URL, WebDAVUser: cfg.Username, WebDAVPass: cfg.Password}), cfg.RootPath, true
 }