We developed a website under the trail Pro license. But now on the production server, we downgraded Craft to Personal. Since then we can't save entries and get a warning about it.
The logfile gives the next errors:
2016-12-07 15:23:53 Level error Category exception.Craft\HttpException.404 Message Craft\HttpException in /removed-path-for-sec/craft/app/controllers/TemplatesController.php:59 2016-12-07 15:23:47 Level error Category application Message CDbConnection failed to open the DB connection: SQLSTATE[HY000]  Access denied for user 'root'@'localhost' (using password: NO)
Upgrading to Pro solves the problem again. Could do that of course, but I'm wondering if there is an other solution :)