Unwanted code showing on frontpage

When i try to post new performances. There is a lot of code that is not supposed to be shown.

“var stageshowlib_attStrings = [];var stageshowlib_pageAnchor = [];var stageshowlib_cssDomain = ‘stageshow’;var stageshowlib_qtyInputsList = [];var stageshowlib_hasAddButtonPerPrice = false;stageshowlib_attStrings[0] = ‘scatt_id=,scatt_perf=,scatt_count=,scatt_months=,scatt_cols=,scatt_separate=,scatt_anchor=,scatt_style=drilldown’;var jQueryURL = “https://hakendoverstoneel.com/wp-admin/admin-ajax.php”;function StageShowLib_JQuery_PostVars(postvars){jQueryURL = “https://hakendoverstoneel.com/wp-admin/admin-ajax.php”;/* stringToHash: 40631|stageshow_jquery_trolley.php|homepamjcoytdcdomainshakendoverstoneel.compublic_htmlwp-contentpluginsstageshowincludestageshowlib_nonce.php||be33nksqzmud8sxx5w5t5cao4iadnqg47egzofepiyrivmckceobgg2wpmmy4pz9 */postvars._wpnonce = “299de7ef9a”;var saleNoteToSellerElem = document.getElementById(“saleNoteToSeller”);if (saleNoteToSellerElem){postvars.saleNoteToSeller = saleNoteToSellerElem.value;}var saleDiscountCodeElem = document.getElementById(“saleDiscountCode”);if (saleDiscountCodeElem){postvars.saleDiscountCode = saleDiscountCodeElem.value;}postvars.action = “stageshowlib_ajax_request”;postvars.request = “stageshowlib_jquery_callback”;postvars.sessionID = “gnttma92b4uh6s16ras0svlt74”;postvars.target = “stageshow_jquery_trolley.php”;return postvars;}jQuery(document).ready(function(){});jQuery(document).ready( function() { stageshow_DrilldownLoaded(); } );”

I have no idea where it comes from, i never had this before. I tested several PHP versions, none resolve this issue.

I tried to deactivate the plugin, doesn’t help. I do not want to delete it to install it, cause then i lose all the other hard work and hours i put in it and i have no time to do this cause i have to find a solution before 1 september!

Sadly enough i cannot find a decent plugin like stageshow, i do need one (that is free) cause stageshow is not updated anymore and thus a security risk. Besides if no one has an idea to resolve this…..i’m f**** anyway since there is no alternate plugin.

The page I need help with: [log in to see the link]