Hi Friends, You may come across the blew error
+++++++++++++++++++++++++++++++++++++++
+DATABASE ERROR: CONNECTION FAILED!           +
+Unable to connect to the database!                                 +
+Please contact your server-administrator.                   +
+++++++++++++++++++++++++++++++++++++++

In order to resolve this error you need to use the following command

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

You can also check if the roundcube and horde database are correct or present there.

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