no endlessScroll and no display the itemslist typo3 7.6

[EricVal]

Hi all
the Wookmark theme Endless scroll doesn't work with typo3 7.6 or 7.5
Impossible to display others pictures after the first twenty…
i don't understand the reason ?
the parameters TS are good and all library are in the page…
endlessScroll = 1 it's OK
itemList {
itemsPerPage = 20
pagerPartial = EXT:yag_themepack_jquery/Resources/Private/Templates/Wookmark/ItemList/Pager.html
} it's OK too

in the source code on the page in the class "yag-wookmark-pager" I can see the number in the "a"
that kind a link : "href="index.php?id=47&tx_yag_pi1%5Bc132%5D%5BalbumUid%5D=7&tx_yag_pi1%5Bc132%5D%5BgalleryUid%5D=5&tx_yag_pi1%5BitemListc132%5D%5BpagerCollection%5D%5Bpage%5D=1&tx_yag_pi1%5Baction%5D=list&tx_yag_pi1%5Bcontroller%5D=ItemList&tx_yag_pi1%5Bformat%5D=json&cHash=94a12b65236a4832cede23c3c1fc9f38"
but the loader doesn't work and when iI click and the linkit 's display the json code ?

Do you have a solution or a direction to find a solution ? Parameter ? is json API necessary ?
Thanks in advance