Need help with Nielsen e-commerce theme

I’m trying to upload the latest update to the Nielsen E-Commerce theme. Unfortunately it completely wiped out the website and only the following error message is displayed.

“Fatal error: Call to undefined function yit_button_style() in /home/content/p3pnexwpnas07_data01/10/2543510/html/wp-content/themes/nielsen/theme/shortcodes.php on line 509”

Any ideas on how to fix this?

Hello there,

Not sure if you’re interested in but I could offer some paid support. Let me know if you’re interested in

gmail(at)moskvayigit.com

Best,

Yigit