0 - Attempt to assign property "text" on null

Hi guys,

Hope you can point me in the right direction what can cause this.
It worked for years ok and after an update of Joomla of SPpagebuilder it looks like I get an error:

1. Frontend logged in
2. I click on Edit SPpagebuiler page on home page
3. I get a Joomla error page with: 0 - Attempt to assign property "text" on null

Some pages work, others not.
I have not found out why.
When I export and import it works on pages where it worked.
So it looks like it is not the content.
Hope you guys can point me in the right direction to look at.