Hi:
Just did a fresh install of Onepage Template v3.0.1. Quickstart Pack Joomla 4.
[Home] page loads but gives a message at top:-
"Warning … Unable to find a user with the ID: 46".
See screenshot attached.

In the Joomla! Admin backend when I go into SP Page Builder Pro and try and edit [Home] page I get a Joomla! error message:-
Sorry, there was a problem we could not recover from.
The server returned a "500 - Whoops, looks like something went wrong."
See screenshot attached.
