Sorry for not responding sooner - I was on holiday. Not a problem to send login credentials (see hidden content) however I believe you should be able to replicate this on your own instance. I actually created a new installation (using a temp Plesk domain in my hosting service) and did only the following:
- Installed Joomla (4.1.0)
- Installed Joomla sample blog content
- Unpublished all sample modules
- Installed Helix (2.0.5)
- Updated Helix to most recent (2.0.7)
- Set Helix template to default
- Created new menu item using Joomla Cassiopia template (not Helix)
- Navigate to home page (see URL in hidden content) -- everything was fine
- Selected the Cassiopia menu item where I get the following message:
Failed opening required '...priceless-allen.173-199-114-177.plesk.page\templates\shaper_helixultimate\html\com_content\featured\default.php' (include_path='.;.\includes;.\pear')
I'm not sure why the Helix code would be required when the menu item is not using that template (as it is using the default Joomla 4 Cassiopia template)
Thanks again for your assistance and I'd appreciate hearing your thoughts...