Hi Mahdi,
I am also experiencing a problem. I had setup the plugin. All worked great. The vacation message was showing up, and the cart button was not showing.
Then I all of a sudden received an order., This is how I noticed that all of a sudden the plugin was not working anymore (after 3 days). I have checked:
the plugin was still active
Latest version plugin and Woocommerce 4.9.1
This is the site.
https://www.luka.com.au
But now you cannot see anything meaningful as I turned off the woocommerce plugin. to sdisable the shopw This in returned caused a total different problem in that I cannot see anything in wp-admin anymore. But that’s likely not related to your plugin. Thanks if tyou can help or have any ideas.
Andreas