# Web Analytics Date format must be: YYYY-MM-DD, or 'today' or 'yesterday' or any keyword supported by the strtotime function (see http://php.net/strtotime for more information):

Hi. Just a minutes after adding a new worpress website it’s imposible to login Piwik. It show this error:

Web Analytics

Date format must be: YYYY-MM-DD, or ‘today’ or ‘yesterday’ or any keyword supported by the strtotime function (see PHP: strtotime - Manual for more information):

What should I do to fix it?

Thans in advance!

Try removing the parameters in the URL ?

Hehehe. It was my first try, but no luck.

It seems a problem with the database data… Trying with several URL parameters (idSite=1 ko, idSite=2 ok) I have managed to login, but now… it shows no data! (I has data since march 5th) It looks like the piwik_site idsite were being modified or some other key.

it should not happen, can you upgrade to latest beta from: Index of /
and try again ?

I did a “test installation” in another directory and ir work fine. If I install it in the old directory, using the same database, Will I lost my previous data?

At least, this should be ok as documented at Installation - Analytics Platform - Matomo

Thanks a lot!

Well I have installed the new beta version and pointed to the old database, but data is not showed, even it no register new visits… (in my previous test, new installation of the beta and new database it registered new visits)