The issue is coming from the WooCommerce plugin’s core as you can see here in their github page, Fortunately, there is a “commit” or a “change” to its core file which fixes this error temporarily which you can see here, as they will eventually include it in future WooCommerce updates.

Now, to apply this fix, you should open “woocommerce-hooks.php” file located in “wp-content/plugins/woocommerce/” folder and search for this line of code:

add_action( 'woocommerce_before_shop_loop', 'woocommerce_show_messages', 10 );

And then, remove this code above it:

add_filter( 'loop_end', 'woocommerce_reset_loop' );
This bug fix is applicable up to Morphis Theme Version 1.9.2.