Uncaught TypeError: Cannot read property 'indexOf' of undefined

[seosmart]

Hello

In my product page not show color images in select options bar. In console this error:
Uncaught TypeError: Cannot read property ‘indexOf’ of undefined
at HTMLOptionElement. (sns-woo.js?ver=5.2.2:626)
at Function.each (jquery.js?ver=1.12.4-wp:2)
at a.fn.init.each (jquery.js?ver=1.12.4-wp:2)
at HTMLSelectElement. (sns-woo.js?ver=5.2.2:621)
at Function.each (jquery.js?ver=1.12.4-wp:2)
at a.fn.init.each (jquery.js?ver=1.12.4-wp:2)
at Object.reDesignVariationForm (sns-woo.js?ver=5.2.2:614)
at HTMLDocument. (sns-woo.js?ver=5.2.2:40)
at i (jquery.js?ver=1.12.4-wp:2)
at Object.fireWith [as resolveWith] (jquery.js?ver=1.12.4-wp:2)

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