When installing OpenX software you might encounter M2M authentcation error – password invalid (code: 823) on the dashboard page.
It is very annoying and there's no good answer on how to fix it. The solution is to not use cPanel Fantastico to install OpenX. This by the way affects a lot of other applications that get installed via Fantastico. When using Fantastico you are on your own for any potential issues that might come up.
If have installed OpenX manually and are seeing this issue. It might be due to another instance of OpenX running on your account
Try this fix for OpenX:
In your web browser open up:
You have to be logged in as administrator.
Follow these directions to install OpenX manually or recruit us to do a professional installation for you.