This is the error we see, does this mean anything to you?
Uncaught TypeError: Cannot read properties of undefined (reading 'currentTheme')
at window.vc_rowBehaviour.window.vc_rowBehaviour (js_composer_front.min.js:10:9014)
at window.vc_js.window.vc_js (js_composer_front.min.js:10:659)
at HTMLDocument.<anonymous> (js_composer_front.min.js:10:20071)
at e (jquery.min.js:2:30038)
at t (jquery.min.js:2:30340)
Only happens when the XStore Child theme is activated (even a fresh new one I downloaded from your Downloads section, no modifications).
Seems that JsComposer (WPBakery builder) doesn’t know how to read your Child Theme?