Solved 500 Internal Server Error

No, just what coming with 5.0RC. It's happened with any set of the icons. No problem at all with Kunena 4.11. I do the test on local server.

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

Joomla! SEF: Disabled | Joomla! SEF rewrite: Disabled | FTP layer: Disabled |

This message contains confidential information

htaccess: Missing | PHP environment: Max execution time: 30 seconds | Max execution memory: 128M | Max file upload: 900M

Kunena menu details:

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ID	Name	Menutype	Link	Path	In trash
101113	Форум	forum	view=home&defaultmenu=100837	f1	No
101120	Последние темы	forum	view=topics&mode=replies	rt1	No
101117	Последнее сообщение	forum	view=topics&layout=posts&mode=recent	rp1	No
100846	ФОРУМ	mainmenu	Itemid=100837	kunena-2015-07-29	No
101115	Мои сообщения	forum	view=topics&layout=user&mode=default	my1	No
101116	Мой профайл	forum	view=user	up1	No
101119	Moderator	forum	view=topics&layout=moderator	moderator	No
43	Мой Профиль	usermenu	view=user	2011-10-18-23-31-02	No
44	Поиск Пользователей	usermenu	view=search	2011-10-18-23-31-30	No
100837	Forum	kunenamenu	view=home&defaultmenu=100838	forum	No
100838	Index	kunenamenu	view=category&layout=list&catid=0	forum/index	No
100839	Recent Topics	kunenamenu	view=topics&mode=replies	forum/recent	No
100840	New Topic	kunenamenu	view=topic&layout=create	forum/newtopic	No
100842	My Topics	kunenamenu	view=topics&layout=user&mode=default	forum/mylatest	No
100843	Profile	kunenamenu	view=user	forum/profile	No
100845	Search	kunenamenu	view=search	forum/search	No
101037	Moderation	kunenamenu	view=topics&layout=moderator	forum/moderation	No
100841	No Replies	kunenamenu	view=topics&mode=noreplies	noreplies	No

Joomla default template details : myprototemp | author: Kyle Ledbetter | version: 1.0 | creationdate: 4/30/2012

Kunena default template details : Crypsis | author: Kunena Team | version: 5.0.0-RC1 | creationdate: 2016-06-05

Kunena version detailed: Kunena 5.0.0-RC1 | 2016-06-05 [ Neptune ]
| Kunena detailed configuration:

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Kunena config settings:
board_offline	0
enablerss	1
threads_per_page	20
messages_per_page	10
messages_per_page_search	15
showhistory	1
historylimit	20
shownew	1
disemoticons	0
template	crypsis
showannouncement	1
avataroncat	1
catimagepath	category_images/
showchildcaticon	1
rtewidth	420
rteheight	300
enableforumjump	1
reportmsg	1
username	1
askemail	0
showemail	0
showuserstats	0
showkarma	1
useredit	1
useredittime	0
useredittimegrace	600
editmarkup	0
allowsubscriptions	1
subscriptionschecked	0
allowfavorites	1
maxsubject	50
maxsig	360
regonly	0
pubwrite	0
floodprotection	0
mailmod	0
mailadmin	1
captcha	0
mailfull	0
allowavatarupload	1
allowavatargallery	1
avatarquality	65
avatarsize	2048
imageheight	800
imagewidth	1024
imagesize	550
filetypes	txt,rtf,pdf,zip,tar.gz,tgz,tar.bz2
filesize	1000
showranking	1
rankimages	1
userlist_rows	30
userlist_online	1
userlist_avatar	1
userlist_posts	1
userlist_karma	1
userlist_email	0
userlist_joindate	1
userlist_lastvisitdate	1
userlist_userhits	0
latestcategory	0
showstats	1
showwhoisonline	1
showgenstats	1
showpopuserstats	1
popusercount	6
showpopsubjectstats	1
popsubjectcount	6
showspoilertag	1
showvideotag	1
showebaytag	0
trimlongurls	1
trimlongurlsfront	40
trimlongurlsback	20
autoembedyoutube	1
autoembedebay	0
ebaylanguagecode	en-us
sessiontimeout	2400
highlightcode	0
rss_type	post
rss_timelimit	week
rss_limit	10
rss_included_categories
rss_excluded_categories
rss_specification	rss2.0
rss_allow_html	1
rss_author_format	name
rss_author_in_title	1
rss_word_count	0
rss_old_titles	1
rss_cache	60
defaultpage	recent
default_sort	asc
sef	1
showimgforguest	1
showfileforguest	0
pollnboptions	6
pollallowvoteone	1
pollenabled	1
poppollscount	6
showpoppollstats	1
polltimebtvotes	00:15:00
pollnbvotesbyuser	100
pollresultsuserslist	1
maxpersotext	50
ordering_system	mesid
post_dateformat	datetime
post_dateformat_hover	datetime
hide_ip	1
imagetypes	jpg,jpeg,gif,png
checkmimetypes	1
imagemimetypes	image/jpeg,image/jpg,image/gif,image/png
imagequality	50
thumbheight	32
thumbwidth	32
hideuserprofileinfo	put_empty
boxghostmessage	1
userdeletetmessage	0
latestcategory_in	1
topicicons	1
debug	0
catsautosubscribed	0
showbannedreason	1
showthankyou	1
showpopthankyoustats	1
popthankscount	6
mod_see_deleted	0
bbcode_img_secure	text
listcat_show_moderators	0
lightbox	1
show_list_time	720
show_session_type	0
show_session_starttime	0
userlist_allowed	1
userlist_count_users	0
enable_threaded_layouts	0
category_subscriptions	topic
topic_subscriptions	first
pubprofile	0
thankyou_max	10
email_recipient_count	0
email_recipient_privacy	bcc
captcha_post_limit	5
image_upload	registered
file_upload	registered
topic_layout	flat
time_to_create_page	1
show_imgfiles_manage_profile	1
hold_newusers_posts	3
hold_guest_posts	0
attachment_limit	10
pickup_category	0
article_display	intro
send_emails	1
fallback_english	1
cache	0
cache_time	60
iptracking	1
rss_feedburner_url
autolink	1
access_component	1
statslink_allowed	0
superadmin_userlist	0
legacy_urls	1
attachment_protection	0
categoryicons	1
avatarresizemethod	1
avatarcrop	0
user_report	1
searchtime	all
teaser	1
ebay_language	0
twitter_consumer_key
twitter_consumer_secret
allow_change_subject	1
max_links	6
read_only	0
ratingenabled	0
url_subject_topic	0
log_moderation	0
attach_start	0
attach_end	14
keywords	0
userkeywords	0
userlist_name	0
usernamechange	0
version_check	1
userlist_usertype	0
sefutf8	0
enablepdf	1
jmambot	0
annmodid	62
changename	1
userlist_username	1
rules_infb	1
help_infb	1
onlineusers	1

| Kunena integration settings:

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Kunena - AlphaUserPoints Disabled
Kunena - AltaUserPoints Disabled
Kunena - Community Builder Disabled
Kunena - Easyblog Disabled
Kunena - Easyprofile Disabled
Kunena - Easysocial Disabled
Kunena - Gravatar Disabled
Kunena - JomSocial Disabled
Kunena - Joomla Enabled: access=1 login=1
Kunena - Kunena Enabled: avatar=1 profile=1
Kunena - UddeIM Enabled: private=1

| Joomla! detailed language files installed:

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Joomla! languages installed:
en-GB	English (en-GB)

Third-party components: UddeIM 3.4

Third-party SEF components: None

Plugins: Content - Kunena Discuss 3.1.2

Modules: Kunena Latest 3.1.1 | Kunena Login 3.0.1

Oh! "Show Labels" should be Disable, or the server give me errors 500 with icons or without.

I uninstall v.5.0.0-RC1.
Install v.4.0.11 - no problems at all
Install v.5.0.0 -BETA 2 - no errors 500 !!!
Install v.5.0.0 -BETA 3 - errors 500 in categories, page navigation dons't work right (in v.5.0.0-RC1 2 too)

I think we fixed it in the next rc. please wait for the new release soon.

RC2 - no 500 problem!
Only links in page navigation(next,or any buttons) in the topics or the massages sending back to Forum "home" (index or Resent Topics)