I am currently testing migration from Joomla 3.10.10 to 4.1.5. I have created a development site using Wampserver on a Windows 10 platform using PHP 8.0.13. The upgrade completes there but if I try to view site template purity_iii (your original) or my arvella copy I get the same error - i.e. I click on the files and details option. The error is duplicated under each link on the page. If I click on copy template, manage folder or new file anyway it appears to work, but if I try template preview, delete list, close or help nothing happens/changes. As far as I am aware I am using the appropriate versions for the template 2.0.1 and the T4 framework 3.1.0. Note that I have debug turned on and errors set to maximum. I attach some screen copies that I hope will assist. Is this something you are aware of and if so could you please advise how I can rectify?
roydene60
I can't replicate this issue at my end.
But I'm wondering that you're working on local and still work with file via backend? I think you can edit files directly and it's better and quick 🙂
I think you are saying that you are surprised I am using the backend rather than editting files directly. I am actually primarily trying to prove that all features will work properly when I migrate the live site and this suggests that this specific feature will not work so I am trying to resolve.
roydene60 Could you try to edit the same with files of default Joomla template?