Question Error 500 in feed page

In my Kunena in the feed link appears the error 500.

www.roero-illuminazione.it/lighting-forum/
then click on the feed icon in right bottom.

I have updated to the latest version 1.6.4 .


Regards!

HTTP 500 Server Errors are nearly always caused by a software error that the developer of that software had not anticipated. The problem may or may not be caused by Kunena.

The way to diagnose these problems (and determine the cause of the error) is to enable Joomla debug mode and Kunena debug mode.

We ask people to look at the posting guidelines, printed at the top of this page, when they submit their questions in the Support category. If you provide all the information requested in the above guide, this will help you to help us to help you quicker and more effectively.

Database collation check: The collation of your table fields are correct

Legacy mode: Disabled | Joomla! SEF: Enabled | Joomla! SEF rewrite: Enabled | FTP layer: Disabled |

This message contains confidential information

htaccess: Exists | PHP environment: Max execution time: 120 seconds | Max execution memory: 64M | Max file upload: 25M

Joomla default template details : rt_solarsentinel_j15 | author: RocketTheme | version: 1.5.3 | creationdate: 04/30/09

Kunena default template details : Blue Eagle (default) | author: Kunena Team | version: 1.6.4 | creationdate: 2011-05-07

Kunena version detailled: Installed version: 1.6.4 | Build: 4832 | Version name: Kerkrade | Kunena detailled configuration:

Warning: Spoiler!

[th]Kunena config settings:[/th]

board_title	Ro&Ro Lighting Forum
board_offline	0
board_ofset	0.00
offline_message	<h2>The Forum is currently offline for maintenance.</h2> Check back soon!
enablerss	1
enablepdf	1
threads_per_page	30
messages_per_page	10
messages_per_page_search	25
showhistory	1
historylimit	6
shownew	1
jmambot	1
disemoticons	0
template	default
showannouncement	1
avataroncat	1
catimagepath	category_images/
showchildcaticon	1
annmodid	63
rtewidth	450
rteheight	300
enableforumjump	1
reportmsg	1
username	0
askemail	1
showemail	0
showuserstats	1
showkarma	1
useredit	1
useredittime	0
useredittimegrace	600
editmarkup	1
allowsubscriptions	1
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allowfavorites	1
maxsubject	85
maxsig	300
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pubwrite	0
floodprotection	0
mailmod	1
mailadmin	1
captcha	0
mailfull	1
allowavatar	1
allowavatarupload	1
allowavatargallery	1
avatarquality	85
avatarsize	2048
allowimageupload	0
allowimageregupload	1
imageheight	900
imagewidth	900
imagesize	150
allowfileupload	0
allowfileregupload	1
filetypes	zip,txt,doc,gz,tgz,jpg,pdf
filesize	120
showranking	1
rankimages	1
avatar_src
fb_profile
pm_component
userlist_rows	30
userlist_online	1
userlist_avatar	1
userlist_name	1
userlist_username	1
userlist_posts	1
userlist_karma	1
userlist_email	0
userlist_usertype	1
userlist_joindate	1
userlist_lastvisitdate	1
userlist_userhits	1
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rss_excluded_categories
rss_specification	rss2.0
rss_allow_html	0
rss_author_format	name
rss_author_in_title	0
rss_word_count	250
rss_old_titles	0
rss_cache	1800
fbdefaultpage	categories
default_sort	asc
alphauserpointsnumchars	0
sef	1
sefcats	1
sefutf8	0
showimgforguest	1
showfileforguest	1
pollnboptions	10
pollallowvoteone	1
pollenabled	1
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polltimebtvotes	00:15:00
pollnbvotesbyuser	100
pollresultsuserslist	1
maxpersotext	500
ordering_system	mesid
post_dateformat	datetime
post_dateformat_hover	ago
hide_ip	1
js_actstr_integration	0
imagetypes	jpg,jpeg,gif,png
checkmimetypes	1
imagemimetypes	image/jpeg,image/jpg,image/gif,image/png
imagequality	60
thumbheight	32
thumbwidth	32
hideuserprofileinfo	put_empty
integration_access	auto
integration_login	jomsocial
integration_avatar	jomsocial
integration_profile	jomsocial
integration_private	jomsocial
integration_activity	jomsocial
boxghostmessage	0
userdeletetmessage	0
latestcategory_in	1
topicicons	1
onlineusers	1
debug	1
catsautosubscribed	0
showbannedreason	1
version_check	1
showthankyou	1
showpopthankyoustats	1
popthankscount	10
mod_see_deleted	0
bbcode_img_secure	text
listcat_show_moderators	1
lightbox	1
activity_limit	0
show_list_time	720
show_session_type	0
show_session_starttime	0
userlist_allowed	0
userlist_count_users	1
enable_threaded_layouts	0
category_subscriptions	post
topic_subscriptions	every
pubprofile	1

Third-party components: Jomsocial 2.2.2.0

Third-party SEF components: sh404sef 2.2.5.964

Plugins: System - Mootools Upgrade: Enabled | System - Mootools12: Disabled | Kunena Discuss 1.6.4

Modules: Kunena Latest 1.6.2 | Kunena Stats 1.6.2

Suggestions:

(1) Please upgrade Kunena Latest and Kunena Stats modules to the latest versions (see Download page)

(2) Try disabling sh404SEF for Kunena pages

(3) Enable Joomla debug mode. Does this give any extra information that may indicate the cause of the error?