I am trying to install JA Coach on a newly upgraded from J3 to J4 site. So, it's an old site with content looking for a new template! Running PHP 8. Joomla 4.2.3
Everything upgraded perfectly. I have reinstalled some other components with no errors.
I follow "manual installation". Step 1 install T4 framework plugin. I presume this is "T4 System Plugin". Correct?
I do this via Install Package but get a completely white screen and 403 error.
Can you please help? Thank you.