loadingHtml not workig correctly with pjax

Hi . i am using jscroll in pjax project and for loadingHtml i use below code
`            loadingHtml: '<div class="text-center"><i class="fa fa-spinner fa-spin fa-fw"></i></div> Loading...',
`

but i get **Uncaught SyntaxError: Invalid or unexpected token**  error . but when i reload page everything is ok.