cPanel roundcube DATABASE ERROR: CONNECTION FAILED

Some of our users can’t connect to their Webmail: When they click on RoundCube , they get this:

DATABASE ERROR: CONNECTION FAILED!
Unable to connect to the database!
Please contact your server-administrator.

Most probably, its an issue with the databases associated with roundcube,
First step is to update Roundcube using the below command:

/usr/local/cpanel/bin/update-roundcube --force

If its still not working try updating it after removing its database.

 mysql -e “drop database roundcube”;
/usr/local/cpanel/bin/update-roundcube --force

If its still not working try to remove it completely and update it

mysql -e “drop database roundcube”;
rm -rf /usr/local/cpanel/base/3rdparty/roundcube
/usr/local/cpanel/bin/update-roundcube –force

Once update completed, check the webmail.
You are done!