Page Builder not showing up in posts / pages

Hi, for several months I’ve had problems with Page Builder. I used it to create several pages or parts of pages, by adding boxes, columns or rows in which I include text, widgets, etc. However, when I go back to edit the page, I see the page as it appears online without any link to the page builder widget. When I make changes I see them on my screen yet when I save and go to public online version, I don’t see my boxes, columns or rows, only the previous version (without any modifications showing)

I’ve spent hours this time (as well as several on other occasions) trying to fix this problem, but cannot figure it out. I’ve tried de-activating other plugins to see if it helps.

When I de-activate Page Builder while keeping Site Origin widgets activated, I see the modifications I’ve made in the page, but everything appears in a single column. I lose all the formatting.

Can someone help me resolve this problem so I can move on and continue to use Page Builder? Thanks