Pb upgrade to 2.5.0 : Access denied for user (1 reply)

Hi,

As usual I've made the PIWIK upgrade using my browser. But last upgrade to 2.5.0 was wrong; the PIWIK URL is now showing an error message and I'm unable to connect.

The only information shown on the piwik screen:

Cannot connect to the database:

SQLSTATE[28000] [1045] Access denied for user 'www-data'@'localhost' (using password: NO)

This may be a temporary issue, try refreshing the page. If the problem persists please contact your Piwik administrator.

I must admit I did not made any backup of the directory content before launching this automatic upgrade... :-(

Any idea? How can I recover ? please help! Thanks