[horde] [HORDE] [imp] PHP ERROR

[chandra prakash]

Hi All,

I am not able to send mail using horde groupware 5.2.11
Can you explain about below mentioned error log ?
How to resolve it?

Nov 12 07:54:50 xn--11b2aty0b2c6e HORDE: [horde] User Administrator logged
out of Horde (202.141.127.73) [pid 23151 on line 107 of
"/var/www/html/horde/login.php"]
Nov 12 07:54:59 xn--11b2aty0b2c6e HORDE: [horde] Login success for
Administrator to horde (202.141.127.73) [pid 9199 on line 164 of
"/var/www/html/horde/login.php"]
Nov 12 07:55:00 xn--11b2aty0b2c6e HORDE: [imp] PHP ERROR: Argument 1 passed
to Horde_Imap_Client_Base::getNamespaces() must be of the type array,
string given [pid 9199 on line 716 of
"/usr/share/pear/Horde/Imap/Client/Base.php"]
Nov 12 07:55:00 xn--11b2aty0b2c6e HORDE: [imp] PHP ERROR: array_map():
Argument #2 should be an array [pid 9199 on line 719 of
"/usr/share/pear/Horde/Imap/Client/Base.php"]
Nov 12 07:55:00 xn--11b2aty0b2c6e HORDE: [imp] PHP ERROR: array_filter()
expects parameter 1 to be array, null given [pid 9199 on line 734 of
"/usr/share/pear/Horde/Imap/Client/Base.php"]
Nov 12 07:55:00 xn--11b2aty0b2c6e HORDE: [imp] PHP ERROR: array_diff():
Argument #1 is not an array [pid 9199 on line 734 of
"/usr/share/pear/Horde/Imap/Client/Base.php"]
Nov 12 07:55:00 xn--11b2aty0b2c6e HORDE: [imp] Login success for
Administrator (202.141.127.73) to {imap://localhost/} [pid 9199 on line 157
of "/var/www/html/horde/imp/lib/Auth.php"]

-- 
--------------------------------
Chandra Prakash
Sr Internet Resource Analyst
National Internet Exchange of India