The function doenst work PLUS Javascript errors...

Uncaught TypeError: Cannot read properties of undefined (reading 'backdrop') at Mw._initializeBackDrop (compiled.min.js?ver=9.0.0-update.4:49:441433) at new t (compiled.min.js?ver=9.0.0-update.4:49:440320) at new Mw (compiled.min.js?ver=9.0.0-update.4:49:444746) at Mw.getOrCreateInstance (compiled.min.js?ver=9.0.0-update.4:30:26057) at compiled.min.js?ver=9.0.0-update.4:49:488612 at Array.forEach () at Object.callback (compiled.min.js?ver=9.0.0-update.4:49:488569) at At (compiled.min.js?ver=9.0.0-update.4:30:26908) at compiled.min.js?ver=9.0.0-update.4:49:489722 at Array.forEach ()Understand this error mdb-cancel-subscription.js?ver=4.20.0-update.3:355 Uncaught ReferenceError: mdb is not defined at mdb-cancel-subscription.js?ver=4.20.0-update.3:355:30 at mdb-cancel-subscription.js?ver=4.20.0-update.3:357:3Understand this error cancel-subscription/?sub=I-KV245TEYTHCD&pm=paypal:986 Uncaught ReferenceError: mdb is not defined at cancel-subscription/?sub=I-KV245TEYTHCD&pm=paypal:986:20Understand this error search.min.js?ver=1.1.0:1 Uncaught (in promise) ReferenceError: mdb is not defined at search.min.js?ver=1.1.0:1:978Understand this error cancel-subscription/?sub=I-KV245TEYTHCD&pm=paypal:899 Uncaught ReferenceError: mdb is not defined at window.onload (cancel-subscription/?sub=I-KV245TEYTHCD&pm=paypal:899:23)