Joomla does not let the admin panel, the page refreshes with no result

If you have a problem with authorization in the admin panel Joomla (when you try to login page obnovlyaetsyai nothing happens), do the following:

1. Run the query to the database:

 UPDATE `dbname`.`prefix_plugins` SET `published` = '1' WHERE `prefix_plugins`.`id` =5 LIMIT 1; 

where dbname - database name, and prefix - the prefix for the tables.

Example:

 UPDATE `joomlabd`.`jos_plugins` SET `published` = '1' WHERE `prefix_plugins`.`id` =5 LIMIT 1; 

2. Or via phpmyadmin:
Go to the panel, look for a table jos_plugins, proceed to viewing the table and look for the module User - Joomla!, Edit the record and published in the field put the number 1 and click the button OK.