DB Schema: NOT OK(Database not initialized) error

[githecha]

I'm trying to install roundcube and in step 3 I get an error DB Schema:  NOT OK(Database not initialized). I have tried to click on initialize database but I cant proceed to finish the installtion.

See below the error given

///////////////////////////////////////////////////////////////////////////////////////

Roundcube Webmail Installer

    Check environment
    Create config
    Test config

Check config file
defaults.inc.php:  OK
config.inc.php:  OK
Check if directories are writable

Roundcube may need to write/save files into these directories
/home/chemlabs/public_html/mail/temp/:  OK
/home/chemlabs/public_html/mail/logs/:  OK
Check DB config
DSN (write):  OK
DB Schema:  NOT OK(Database not initialized)

Test filetype detection
Fileinfo/mime_content_type configuration:  NOT OK

Check the Fileinfo functions of your PHP installation.
The path to the magic.mime file can be set using the mime_magic config option in Roundcube.
Mimetype to file extension mapping:  OK

///////////////////////////////////////////////////////////////////////////////////////////