Dashboard error after WP update

Hi,

I’m getting the following error in my dashboard after the last WordPress update.

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘az_enqueue_color_picker’ not found or invalid function name in /home/*** on line 525

What could the problem be?

https://ww.wp.xz.cn/plugins/woocommerce-frequently-bought-together/