Please Change in Icon Hiperlink on CWP.Client->Mail Management->Webmail(roundcub

Please Change in Icon Hiperlink
CWP.Client->Mail Management->Webmail(roundcube)

it goto on http://domain_name.com/roundcube/
and get error

Not Found

The requested URL /roundcube/ was not found on this server.

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But when
go to directly http://domain_name.com/webmail

its nice working