In WordPress, when trying to delete a plugin, the error “Could not remove old plugin (古いプラグインを削除できませんでした。)” occurred.

I think the cause is that the directory owner is not apache or nginx, so I’ll change the owner with chown.

If the WordPress site installation path is /var/www/vhosts/codenote.net, it would look like this:

# cd /var/www/vhosts
# chown -R nginx. codenote.net

That’s all from the Gemba.