The other day, I attempted to install the download in a Joomla 3.10 site.
The error message I received was:
Warning
JInstaller: :Install: Can't find XML setup file.
Error
Unable to detect manifest file.
How is this application installed on Joomla?
Failed Installation on Joomla
Re: Failed Installation on Joomla
Admidio is not a Joomly native application. You must install Admidio separatly.