Hello I give up trying to understand why SPPB doesn't care about the row height I entered. 2nd problem : the front end editing of SPPB gives a blank page.

Last minute : This white space disappeared, I don't know why. Now it's below another row, in which I found a fixed height of 600 pix (maybe I added it by mistake earlier, but it was not displayed untill now). So, I also remove this row height, empty the caches .... but SPPB still doesn't care. The empty space below this row is still there.

There is a problem in this SPPB, but I don't think I had this problem in other sites. In the code, I find the culprit, but I don't find where to change it: sp-page-builder .page-content #section-id-1564128805126 { height: 100vh;

Now I added a max height, and it finally works ....