Since a couple of days, I have not been able to edit using the System editor. When I open the System editor, the page flashes and reloads once a second, and the only action I can take is to close the editor. Before "something" happened, I had no problems using the system editor. Obviously, something has happened to the site, but I cannot recall having made any change that could trigger this issue.
Joomla 6.0.3
SP Page Builder 6.3
Helix 2.2.4