Hello @Ofi,
the zip is unfortunately really only the Joomla3 variant.
This is due to the included Helix-Ultimate.
This still uses the old functions that are no longer available in Joomla4.
Call to undefined method Joomla\CMS\Application\AdministratorApplication::isAdmin()
and
behavior::caption
As a result, the backend is then no longer usable.
After I corrected this and updated Helix, it turned out that it is a Joomla3 template, because it also still uses the old "behavior::caption" functions, which in turn lead to errors.
The solution here was to download Quickstart and copy out only the template folder.
This is already without the old calls.
After that, the template now worked without error messages under PHP 8.0.22.
So far I could not find any problems after that.
I tested it with the following:
- PHP 8.0.22
- Joomla 4.2.2
- Helix Ultimate 2.0.11
- Startup-Landing 2.0.0
- SP-Page-Builder 4.0.4
With kind regards