sticky menu

Hello, i can make the sticky logo be like normal menu, if you can share a link to your site 🙂

Hello, i think it will be all css, so will be placed at style.css file, at child theme

Hola, entiendo, puedes usar el widget de woocommerce para buscar si te falla la lupa.
El precio sin iva o con iva depende de como lo configures en woocommerce, sé que hay una opción que muestra los precios sin o con iva depende de si están en la tienda o en el carrito.
Respecto al popup, prueba usando este css

#productModal {
    max-width: 950px !important;
    width: 100% !important;
}

El problema es el tamaño de la imagen

Hola, ya veo, tienes todos los plugins actualizados a la ultima versión?
Prueba lo siguiente:

Please update the theme to latest version and the afferent plugins, you can check the plugin update status from wp-admin -> appearance -> install plugins.

If this is useless please follow these steps to enable wp debug:

•  Connect to your server by FTP
• Look in root directory of your WordPress install and open wp-config.php
• Search for define( ‘WP_DEBUG’, false ); and change FALSE value to TRUE

define( 'WP_DEBUG', true );

•   After this line add this:

define( 'WP_DEBUG_LOG', true );

WP_DEBUG_LOG is a companion to WP_DEBUG that causes all errors to also be saved to a debug.log log file inside the /wp-content/ directory. This is useful if you want to review all notices later or need to view notices generated off-screen (e.g. during an AJAX request or wp-cron run).

Repeat the described actions and then check the debug.log file and let me know what error appears.

If this is useless please try to deactivate additional plugins except Visual Composer, K-elements, BuddyPress, Paid memberships pro and revolution slider.

After you have disabled the plugins try to see if the error persists.

Cheers

Hola, lo has añadido al child theme y al quick css y en ningun lado funciona?