[imp] installation problem Undefined index

[juan carlos]

i have installed a new server horde and imp, and have the following errors in
the login screen

Undefined index: alternate_login in /usr/share/horde3/imp/login.php on line 138

Undefined index: server_list in /usr/share/horde3/imp/login.php on line 167

Undefined index: server_list in /usr/share/horde3/imp/login.php on line 205

Undefined index: cachejs in /usr/share/horde3/imp/lib/IMP.php on line 1872

Undefined index: cachecss in /usr/share/horde3/imp/lib/IMP.php on line 2021