flow flow not display feed

I have put the plug in on my website.. all is connect but nothing is displayed.
I have this error in console of chrome

public.js?ver=4.6.24:1 Uncaught TypeError: Cannot read properties of undefined (reading 'length')
    at Object.buildStreamWith (public.js?ver=4.6.24:1)
    at (indice):450
    at fire (jquery.js?ver=3.5.1:3496)
    at Object.add [as done] (jquery.js?ver=3.5.1:3555)
    at Array.<anonymous> ((indice):446)
    at fire (jquery.js?ver=3.5.1:3496)
    at Object.fireWith [as resolveWith] (jquery.js?ver=3.5.1:3626)
    at Object.<anonymous> (jquery.js?ver=3.5.1:4009)
    at fire (jquery.js?ver=3.5.1:3496)
    at Object.fireWith [as resolveWith] (jquery.js?ver=3.5.1:3626)