jQuery.Deferred exception: Bad control character in string literal

you may need to exclude certain JS from optm, please check this page

I’ve disabled all caching for both css and js and the problem still persist. It looks like the problem might be lying in admin-ajax.php which is not loading when the plugin features are working. It looks like that request is responsible for loading jquery of yith wishlist plugin as in response of admin-ajax.php request I got the following:

{
“fragments”: {
“yith-wcwl-add-to-wishlist.add-to-wishlist-885.wishlist-fragment.on-first-load”: “\n\n\t\t\t\n\t\t\t\n\t\t\t\n

\n\t\t\n\t\t<\/i>\t\tDodaj u favorite<\/span>\n\t<\/a>\n<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t<\/div>\n”,
“yith-wcwl-add-to-wishlist.add-to-wishlist-1588.wishlist-fragment.on-first-load”: “\n\n\t\t\t\n\t\t\t\n\t\t\t\n\n\t\t\n\t\t<\/i>\t\tDodaj u favorite<\/span>\n\t<\/a>\n<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t<\/div>\n”,
“yith-wcwl-add-to-wishlist.add-to-wishlist-1603.wishlist-fragment.on-first-load”: “\n\n\t\t\t\n\t\t\t\n\t\t\t\n\n\t\t\n\t\t<\/i>\t\tDodaj u favorite<\/span>\n\t<\/a>\n<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t<\/div>\n”,
“yith-wcwl-add-to-wishlist.add-to-wishlist-1599.wishlist-fragment.on-first-load”: “\n\n\t\t\t\n\t\t\t\n\t\t\t\n\n\t\t\n\t\t<\/i>\t\tDodaj u favorite<\/span>\n\t<\/a>\n<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t<\/div>\n”,
“yith-wcwl-add-to-wishlist.add-to-wishlist-1622.wishlist-fragment.on-first-load”: “\n\n\t\t\t\n\t\t\t\n\t\t\t\n\n\t\t\n\t\t<\/i>\t\tDodaj u favorite<\/span>\n\t<\/a>\n<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t<\/div>\n”,
“yith-wcwl-add-to-wishlist.add-to-wishlist-877.wishlist-fragment.on-first-load”: “\n\n\t\t\t\n\t\t\t\n\t\t\t\n\n\t\t\n\t\t<\/i>\t\tDodaj u favorite<\/span>\n\t<\/a>\n<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t<\/div>\n”,
“yith-wcwl-add-to-wishlist.add-to-wishlist-1607.wishlist-fragment.on-first-load”: “\n\n\t\t\t\n\t\t\t\n\t\t\t\n\n\t\t\n\t\t<\/i>\t\tDodaj u favorite<\/span>\n\t<\/a>\n<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t<\/div>\n”,
“yith-wcwl-add-to-wishlist.add-to-wishlist-1618.wishlist-fragment.on-first-load”: “\n\n\t\t\t\n\t\t\t\n\t\t\t\n\n\t\t\n\t\t<\/i>\t\tDodaj u favorite<\/span>\n\t<\/a>\n<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t<\/div>\n”,
“yith-wcwl-add-to-wishlist.add-to-wishlist-1638.wishlist-fragment.on-first-load”: “\n\n\t\t\t\n\t\t\t\n\t\t\t\n\n\t\t\n\t\t<\/i>\t\tDodaj u favorite<\/span>\n\t<\/a>\n<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t<\/div>\n”,
“yith-wcwl-add-to-wishlist.add-to-wishlist-864.wishlist-fragment.on-first-load”: “\n\n\t\t\t\n\t\t\t\n\t\t\t\n\n\t\t\n\t\t<\/i>\t\tDodaj u favorite<\/span>\n\t<\/a>\n<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t<\/div>\n”,
“yith-wcwl-add-to-wishlist.add-to-wishlist-1626.wishlist-fragment.on-first-load”: “\n\n\t\t\t\n\t\t\t\n\t\t\t\n\n\t\t\n\t\t<\/i>\t\tDodaj u favorite<\/span>\n\t<\/a>\n<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t<\/div>\n”,
“yith-wcwl-add-to-wishlist.add-to-wishlist-1634.wishlist-fragment.on-first-load”: “\n\n\t\t\t\n\t\t\t\n\t\t\t\n\n\t\t\n\t\t<\/i>\t\tDodaj u favorite<\/span>\n\t<\/a>\n<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t<\/div>\n”
}
}

what if you reset LiteSpeed plugin to default setting ? you can do so in toolbox -> import/export -> reset to default

If i do that everything is good, I guess I should start plugin setup all over again and purge & test with each change I make? Thanks

Ok, I have identified the problem:
Enable ESI was the setting that was causing the issue

did you apply any ESI shortcode/widget or something ?