error after post an answer

[cema93]

Еhe answer does not appear until you refresh the page when answering a question on my website https://povestka.by/questions/

in console

Uncaught TypeError: Cannot read property 'top' of undefined
at s.fn.init.jQuery.fn.apScrollTo (common.js:305)
at i.formPosted (question.js:390)
at p (backbone.min.js:2)
at f (backbone.min.js:2)
at l (backbone.min.js:2)
at Object.n.trigger (backbone.min.js:2)
at Object.success (common.js:740)
at Object.t.success (form.min.js:22)
at c (jquery.min.js:2)
at Object.fireWith [as resolveWith] (jquery.min.js:2)