I know this has been discussed more than once, still the offered solutions and my intelligence don't help past the following message: Code: DATABASE ERROR: CONNECTION FAILED! Unable to connect to the database! Please contact your server-administrator. I am the server administrator. I'm in the process of setting up a virtual server running CentOS 7.5 (I believe, or it's 7.4) and followed the tutorial for CentOS 7.4 to the letter. Yet, roundcube refuses to work. I tried several things: I got into the database with myphpadmin, found the user, found that it hadn't been granted write access, so I gave those. Yet the same error message. I also found that the password was written witholut encryption in the database, so I put it in again with the aprropriate mysql command, and now it's encrypted. But still roundcube doesn't want to do the installation properly. There it always tells me: Code: "DSN (write): NOT OK(SQLSTATE  Access denied for user 'roundcubeuser'@'localhost' (using password: YES))" Any help will be appreciated.