When I try to install the package_template.zip, I don't see the template appear under Extensions > Templates > Styles. I've also installed all the files from components and modules.
When I try to install the quickstart.zip, I get the message: JInstaller: :Install: Can't find XML setup file. The Joomla Package cannot be installed through the Extension Manager. Please use the Joomla! Update component to update Joomla.
My Joomla version is currently up to date (v. 3.9.2).
So, I'm not sure what I need to do next.
I'm a new Joomla user, so any help or insight would be appreciated!
Thank you very much.