Try like this, there is a problem with installer for Joomla 2.5. Download and unzip the Gantry Framework Extension 4.1.33 and then install all zip files one by one using installer or wait for the 4.1.34 version.
Looks like version 4.1.34 was released, but we're still running into the same update issues (from 18 Jul 2017 15:38). From Damir's response on 18 Jul 2017 21:52, we manually downloaded the Gantry Framework Extension zip file, unzipped that Gantry Framework Extension file, but inside there are no zip files to manually install onto our site. All we see are 4 items:
language folder (not compressed/zipped)
packages folder (not compressed/zipped)
install.php
pkg_gantry.xml
How can we manually install this latest version of Gantry if we can't use the Joomla installer, Watchful updater, nor Watchful installer?
Thank you, Damir, for those clear instructions. Gantry updated!
I know J2.5 is not longer supported, but I do have a couple of clients that will not consider the upgrade. They've been told the risks.
Vicky
An old dog can learn new tricks - I saw it on Mythbusters!