Ok.
I found it, the problem is the method invoked into:
WP_Filesystem_Direct::wp_mkdir_p() in /wp-content/themes/noo-mebla/includes/libs/noo-customize.php
WP_Filesystem uses mkdir() instead of wp_mkdir_p()
Just to inform you in case you want to update the theme.
In addition, there is also a typo within Woocomerce's Thank you plugin:
wp_kese() in /wp-content/themes/noo-mebla/woocommerce/checkout/thankyou.php
These function should be called as wp_kses()
All the best,
David