Solved Error 404: add message

After the upgrade to version 5.0.7, the topics are not published error 404
What's the most interesting mysite.com/forum work, add message mysite.com/forum the same URL but error 404

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

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

This message contains confidential information

htaccess: Exists | PHP environment: Max execution time: 60 seconds | Max execution memory: 128M | Max file upload: 32M

Kunena menu details:

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ID	Name	Menutype	Link	Path	In trash
289	Форум профиль	mainmenu	view=user	profile/forum-profile	No
610	Форум	mainmenu	Itemid=625	kunena-2017-04-11	Yes
625	Форум	kunenamenu	view=home&defaultmenu=627	forum	No
626	Оглавление	kunenamenu	view=category&layout=list	forum/index	No
627	Последнее	kunenamenu	view=topics&mode=replies	forum/recent	No
628	Новая тема	kunenamenu	view=topic&layout=create	forum/newtopic	No
629	Без ответов	kunenamenu	view=topics&mode=noreplies	forum/noreplies	No
630	Мои темы	kunenamenu	view=topics&layout=user&mode=default	forum/mylatest	No
631	Профиль	kunenamenu	view=user	forum/profile	No
632	Помощь	kunenamenu	view=misc	forum/help	No
633	Поиск	kunenamenu	view=search	forum/search	No

Joomla default template details : tattoo | author: | version: 1.0 | creationdate: 2017-03-01

Kunena default template details : Crypsisb3 | author: Kunena Team | version: 5.0.7 | creationdate: 2017-03-31

Kunena template params:

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DefaultCategoryicon	glyphicon glyphicon-folder-open glyphicon-big
profileIconset	default
DefaultIconset	default
editorIconset	default
lightboxColor	white
borderless	1
tooltips	1
SubjectLengthMessage	80
fullactions	1
quick	0
displayMenu	1
displayDropdownMenu	1
displayDropdownContent	1
displayModule	1
displayBreadcrumb	1
displayAnnouncement	1
displayFooter	1
avatarPosition	right
formRecover	1
labels	0
whoisonlineName	default
avatarType	img-rounded
topicicontype	fa
fontawesome	1
icons	1
socialshare	1
socialtheme	classic
writeaccess	0
localstorage	1
video	1
maps	1
emoticons	1
twitter	1
ebay	1
link	1
picture	1
hide	1
spoiler	1
table	1
code	1
quote	1
divider	1
instagram	1
soundcloud	1
confidential	1
hr	1
listitem	1
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numericlist	1
bulletedlist	1
alignright	1
alignleft	1
center	1
underline	1
italic	1
bold	1
strikethrough	1
colors	1
size	1
IconColor	#141313
IconColorNew	#48a348
avatarSizeX	40
avatarSizeY	90
avatarSizeXThumb	36
avatarSizeYThumb	36
avatarSizeXWelcome	70
avatarSizeYWelcome	70
avatarSizeXList	36
avatarSizeYList	36
avatarSizeXPost	184
avatarSizeYPost	184
avatarSizeXProfile	200
avatarSizeYProfile	200
socialsharetag
templatebyText
templatebyName
templatebyLink

Kunena version detailed: Kunena 5.0.7 | 2017-03-31 [ Gayal ]
| Kunena detailed configuration:

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Kunena config settings:
credits	0
board_offline	0
enablerss	1
threads_per_page	20
messages_per_page	6
messages_per_page_search	15
showhistory	1
historylimit	6
shownew	1
disemoticons	0
template	crypsisb3
showannouncement	1
avataroncat	1
catimagepath	category_images
showchildcaticon	1
rtewidth	450
rteheight	300
enableforumjump	1
reportmsg	1
username	1
askemail	0
showemail	0
showuserstats	1
showkarma	1
useredit	1
useredittime	600
useredittimegrace	600
editmarkup	1
allowsubscriptions	1
subscriptionschecked	1
allowfavorites	1
maxsubject	50
maxsig	300
regonly	0
pubwrite	1
floodprotection	0
mailmod	0
mailadmin	0
captcha	-1
mailfull	1
allowavatarupload	1
allowavatargallery	1
avatarquality	75
avatarsize	2048
imageheight	800
imagewidth	1600
imagesize	300
filetypes	txt,rtf,pdf,zip,tar.gz,tgz,tar.bz2
filesize	120
showranking	1
rankimages	1
userlist_rows	30
userlist_online	1
userlist_avatar	1
userlist_posts	1
userlist_karma	1
userlist_email	0
userlist_joindate	0
userlist_lastvisitdate	0
userlist_userhits	1
latestcategory
showstats	1
showwhoisonline	1
showgenstats	1
showpopuserstats	1
popusercount	15
showpopsubjectstats	1
popsubjectcount	10
showspoilertag	1
showvideotag	1
showebaytag	1
trimlongurls	1
trimlongurlsfront	40
trimlongurlsback	20
autoembedyoutube	1
autoembedebay	1
ebaylanguagecode	en-us
sessiontimeout	1800
highlightcode	0
rss_type	recent
rss_timelimit	month
rss_limit	100
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	0
rss_cache	900
defaultpage	recent
default_sort	desc
sef	1
showimgforguest	1
showfileforguest	1
pollnboptions	7
pollallowvoteone	1
pollenabled	1
poppollscount	5
showpoppollstats	1
polltimebtvotes	00:15:00
pollnbvotesbyuser	100
pollresultsuserslist	1
maxpersotext	50
ordering_system	replyid
post_dateformat	datetime_today
post_dateformat_hover	datetime
hide_ip	1
imagetypes	jpg,jpeg,gif,png
checkmimetypes	1
imagemimetypes	image/jpeg,image/jpg,image/gif,image/png
imagequality	60
thumbheight	50
thumbwidth
hideuserprofileinfo	put_empty
boxghostmessage	0
userdeletetmessage	1
latestcategory_in	1
topicicons	1
debug	0
catsautosubscribed	0
showbannedreason	1
showthankyou	1
showpopthankyoustats	1
popthankscount	5
mod_see_deleted	0
bbcode_img_secure	text
listcat_show_moderators	0
lightbox	1
show_list_time	8760
show_session_type	2
show_session_starttime	1800
userlist_allowed	1
userlist_count_users	1
enable_threaded_layouts	0
category_subscriptions	post
topic_subscriptions	first
pubprofile	1
thankyou_max	10
email_recipient_count	0
email_recipient_privacy	bcc
captcha_post_limit	0
image_upload	registered
file_upload	registered
topic_layout	flat
time_to_create_page	0
show_imgfiles_manage_profile	1
hold_newusers_posts	5
hold_guest_posts	0
attachment_limit	10
pickup_category	1
article_display	intro
send_emails	1
fallback_english	1
cache	1
cache_time	120
iptracking	1
rss_feedburner_url
autolink	1
access_component	0
statslink_allowed	1
superadmin_userlist	0
legacy_urls	0
attachment_protection	1
categoryicons	1
avatarresizemethod	1
avatarcrop	0
user_report	1
searchtime	365
teaser	0
ebay_language	0
twitter_consumer_key
twitter_consumer_secret
allow_change_subject	1
max_links	3
read_only	0
ratingenabled	1
url_subject_topic	1
log_moderation	0
attach_start	0
attach_end	14
google_map_api_key
attachment_utf8	1
autoembedsoundcloud	1
emailheader	/media/kunena/email/hero-wide.png
user_status	1
plain_email	0

| 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 Disabled

| Joomla! detailed language files installed:

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Joomla! languages installed:
en-GB	English (en-GB)
en-US	English (USA)
lv-LV	Latvian
uk-UA	Ukrainian (uk-UA)
ru-RU	Russian

Third-party components: None

Third-party SEF components: None

Plugins: Search - Kunena Search 5.0.2

Modules: Kunena Stats 5.0.2

The osmap xml plugin also stopped working
Updating sadness and longing, I wanted as best it turned out as always (

Please check in "Backend -> Kunena -> Plugins" whether the plugin Kunena - Finder Integration is enabled. If yes, then disable it.

working!