How do I change the url from squarespace default?

My website just went live today, but one of the page which is a form builder widget from elfsight which will open in another tab.

Upon opening the tab, the URL changes not to my website domain but as the squarespace trial domain naming like: cymbal-heron-blahblahblah

How do I change it to my website domain? It turns buggy after click on the jobs, other pages also start to use the glibberish name.

*Click on any of the jobs "Learn More" to go to the form builder page

https://www.chaptrconsulting.com/jobs