class-wpperformance.php line 183

Hi there,

We are running into an issue with the way you are detecting if WooCommerce is enabled.

Line 183:
$enabled_woocommerce = function_exists( 'is_woocommerce' );

You should check it this way:
https://docs.woocommerce.com/document/create-a-plugin/

Furthermore on line 185, you should check if is_account_page && is_checkout exists:
$wc_invalid_disable = ! $enabled_woocommerce || $invalid_disable || is_account_page() || is_checkout();