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Joomla Admin Locked out - JAuthentication::__construct: Could not load authentication libraries

Recently I've locket myself out of Joomla Admin as I have accidentally disabled the Authentication - Joomla plug-in.

 



When I tried to login to Joomla Backend with my Administrator account I've received the following error:

JAuthentication::__construct: Could not load authentication libraries. Username and password do not match.

To solve this I had to edit the Joomla database table to enable Authentication - Joomla plug-in.

Here's how to do it:

Login to you CPanel | On the home page scroll down to Databases and open phpMyAdmin

In the left pane of phpMyAdmin select your Joomla Database. From the same pane, select jos_plugins table

Now click on the pencil item to edit Authentication - Joomla row

In the 'Published' row change the value from 0 to 1

Make sure that Save is selected from the dropdown list and click the Go button.

That's it, you should be able to login to Joomla admin now

NOTE: Once I've changed that, I still couldn't login to Joomla Admin. The reason for this is that I had jos_plugins and bak_plugins tables. Once I changed the value for the bak_plugins table I was able to login.

In my case, duplicate tables exist because I've migrated from 1.0 to 1.5.

Comments are welcome.

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