Since I user Elementor editor to edit my pages not sure other than going to appearance then customize which will give you the option to add that CSS code.
Not seen on my site that I know of but is from Geekflare who says it. Would be ok to replace most of the files on my site other than wp-config and wp-content folders in tack or would say maybe a file check on last modified be the other option.
Not sure if this is the issue but looks like might be this css class
.vc_row.vc_row-o-full-height {
min-height: auto;
}
is currently this
.vc_row.vc_row-o-full-height {
min-height: 100vh;
}
What are you using to edit the page? and have you tried to add custom css to remove the white spaces?
