TypeError: f.easing[i.animatedProperties[this.prop]] is not a function

this error occurs when a newer version of jquery and jquery.easing is used with an older version of the call to animate.easing. Do a search in your javascript of your theme for the text “easeout” or “easein” or “easeinout”.

I solve this problem different way. I got this problem when I try to active animation existing slider site. I find out this problem when animate function enable. this conflict to slider JS file.

I block this slider JS only for home page, problem solved.
Please try if you face any problem please reply me I will try to solve your problem.