Collapse is not working

Hi Meytal,
Thanks for your response. The ‘collapse’ function work like the ‘hidden’ function.
When I am collapsing a text box , the other elements not adjust accordingly and resize to fill in the void.

the location of the proplem is in my new editor X website, https://wisamtozah.editorx.io/home/blank

I have tried in diffrent pages, diffrent options, but still the same. It is NOT WORKING.

I am trying to have a very basic collapse menu like the one below here, but unable to achieve it:
https://www.wix.com/corvid/example/collapse-elements

Below the screen shots.

This is where I am collapsing the text boxes.

the page is not resized to fill in the void as shown below:

Regards,