Installed update for an extension (EmailDirect, after running patch 6788) successfully on local environment, but when uploaded to testing server it throws a "404 page not found".
I even reinstalled a local copy from GIT, so both local and testing servers have the same code. Flushed cache several times and nothing, keeps missing the page only on testing server.
I've tried https://stackoverflow.com/questions/18724995/magento-404-on-admin-page accepted answer. If the page is ok then it shows the stacktrace, but if it's 404 it doesn't.
So i basically don't know why it's throwing a "404 not found" or how to debug it.