strange js exceptions on product detail page.

[Diddino12]

prestashop 1.7.5.1 here:

When i open the product detail, on loading page, i found this errors during the js debugging:

DOMException: Failed to execute 'querySelectorAll' on 'Element': '*,:x' is not a valid selector.

DOMException: Failed to execute 'webkitMatchesSelector' on 'Element': '[s!='']:x' is not a valid selector.

DOMException: Failed to execute 'querySelectorAll' on 'Element': '*,:x' is not a valid selector.

DOMException: Failed to execute 'querySelectorAll' on 'Document': '#attribute_group optgroup#75' is not a valid selector.  main.bundle.js:313

Error: No select2/i18n/it

Error: No en

DOMException: Failed to execute 'querySelectorAll' on 'Element': '#form_step1_features_0_feature :selected' is not a valid selector.

--loop--

Error: No select2/i18n/it

Error: No en

Error: No it

--loop--

well If i uncheck the 'pause on caught exception' to pass throught the exceptions loop, the page loads:

If i try to click the preview(Anteprima in screenshot) button can't catch any exception with debug, a new page with a spinning circle appear but nothing happen there, the BO doesn't works anymore until a restart server throught ssh service apache2 restart command, then this exception in js is thrown: 

DOMException: Failed to execute 'querySelectorAll' on 'Document': 'body:not(:has(#growls-default))' is not a valid selector.

in mainbundle.js

SyntaxError: Unexpected token u in JSON at position 0.

form.js?1.7.5.1:703

any advice or help is greatly appreciated. thanks