I am installing Gantry 5.4.12 in Joomla 3.7.2. I receive the errors:
Warning
JInstaller: :Install: Can't find XML setup file.
Error
Unable to find install package
I have an older, and looks broken version of Gantry already installed
Gantry 4.1.12
Also, it looks like the site is using Rt_alerion. But, currently can't edit the template since Gantry is broken.
Any ideas on how to update Gantry and getting around this error?
Alerion is built on Gantry 4, so you do not need to install Gantry 5 at all.
If you want to install it anyways, make sure you use the correct file, it's called: joomla-pkg_gantry5_v5.4.12.zip
The latest version of Gantry 4 is 4.1.32 and you can download it here:
gantry.org/downloads#gantry4
The file you need is called: gantry_joomla_framework-4.1.32.zip (Gantry Framework Extension)