No products shown

I only see the loader icon and no products in my front end table. In the backend I see the products, although data from custom fields isn’t visible

Error messages on the page:
Uncaught TypeError: table.DataTable is not a function
at Object.initializeTable (core.tables.js?ver=1.0.9:61)
at HTMLDivElement.<anonymous> (tables.frontend.js?ver=1.0.9:19)
at Function.each (jquery.js?ver=1.12.4-wp:2)
at n.fn.init.each (jquery.js?ver=1.12.4-wp:2)
at WtbpFrontendPage.initializeTable (tables.frontend.js?ver=1.0.9:17)
at WtbpFrontendPage.init (tables.frontend.js?ver=1.0.9:10)
at HTMLDocument.<anonymous> (tables.frontend.js?ver=1.0.9:40)
at i (jquery.js?ver=1.12.4-wp:2)
at Object.fireWith [as resolveWith] (jquery.js?ver=1.12.4-wp:2)
at Function.ready (jquery.js?ver=1.12.4-wp:2)
embed.js:6 [Deprecation] Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help, check https://xhr.spec.whatwg.org/.
q.getText @ embed.js:6
VM580:1 Failed to load resource: the server responded with a status of 404 ()
(anonymous) @ VM580:1
The resource https://pagead2.googlesyndication.com/pagead/js/r20190522/r20190131/show_ads_impl.js was preloaded using link preload but not used within a few seconds from the window’s load event. Please make sure it has an appropriate as value and it is preloaded intentionally.

Images:
https://snag.gy/vBrsZx.jpg

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