I'm trying to upgrade a few plugins, but the /modules/plugin name directory was being shown with this error. What should the permissions ideally be? Another thing that I found strange was that only the German language was listed below the plugin name. The plugins I was trying to upgrade are aboutpage and contactowner.
Posts: 22879
Permissions issue I suspect and this faq will help out.
FAQ: Upgrading a Gallery that has been installed with the Pre-Installer
Dave
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Blog & G2 || floridave - Gallery Team
Posts: 236
Turns out I needed to chown some of the plugin folders to www-data, wheras they were owned by my username previously.