Hello again,
I ugraded to version 5 and many issues rised (latest Joomla 4, cleared cache, everything).
First of all the new version is not compatible with sp portfolio, I get the following error:
"Class "ApplicationHelper" not found". /plugins/spsimpleportfolio/sppagebuilder/sppagebuilder.php(47)
Also on blog page I get the following error
"Class "AddonsHelper" not found".
/components/com_sppagebuilder/helpers/helper.php(640)
On some pages the custom css was broken.
Unfortunately I had to revert to previous version, because the website is live.