Site Origin Layout Block not working properly

Hello,
for a while now I have been using Site Origin Page Builder to create all the non-GD-pages of my website.
From my point of view the block system of Gutenberg / Classic Editor requires advanced knowledge in codes and css-styles to create an attractive layout.
So for people like me not beeing so familiar with codes and css-styles, Site Origin page builder is just perfect and saves a lot of time and nerves.

However, for some time now, when I try to set up a new non-GD page with normal content, I cannot select to do this with site origin page builder anymore. I am forced to use this block system (even though I deactivate classic editor and gutenberg plugins).
Yes, there is a Site Origin Layout Block, but this works only very restrictive, e. g. it is not possible to enter any text in the site origin text editor widget.

Do you have an idea how I can bypass this block system for non-GD-pages and use Site Origin page builder again?
And please, don’t tell me I can use beaver pb as well, I have tried it out but do not cope with it.

Any idea?
Many thanks!
Birgit