Solved Styles disappearing

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: 100M

Kunena menu details:

Warning: Spoiler!

ID	Name	Menutype	Link	Path	In trash
755	Recent Posts	top	view=topics&layout=posts&mode=recent	recent-posts	Yes
305	Recent Forum posts	jtouch-nav	view=topics&layout=posts&mode=recent&userid=	recent-forum-posts	No
1515	Forum	top	Itemid=1839	kunena-2018-09-05	No
1517	Forums Index	top	view=home&defaultmenu=331	forums/forums-index	No
1518	Recent Topics	top	view=topics&mode=replies	forums/recent-topics	No
1519	Private Mini-Holland Forum	top	view=category&catid=39	forums/private-mini-holland-forum	No
1520	Fox Forum	top	view=category&catid=44	forums/fox-forum	No
1521	Friends of the Lakes Estate private forum	top	view=category&catid=6	forums/friends-of-the-lakes-estate-private-forum	No
1839	Forum	kunenamenu	view=home&defaultmenu=1841	forum	No
1840	Index	kunenamenu	view=category&layout=list	forum/index	No
1841	Recent Topics	kunenamenu	view=topics&mode=replies	forum/recent	No
1842	Unread	kunenamenu	view=topics&layout=unread	forum/unread	No
1843	New Topic	kunenamenu	view=topic&layout=create	forum/newtopic	No
1844	No Replies	kunenamenu	view=topics&mode=noreplies	forum/noreplies	No
1845	My Topics	kunenamenu	view=topics&layout=user&mode=default	forum/mylatest	No
1846	Profile	kunenamenu	view=user	forum/profile	No
1847	Help	kunenamenu	view=misc	forum/help	No
1848	Search	kunenamenu	view=search	forum/search	No
2046	Recent Forum Topics	hiddenmenu	view=topics&mode=replies	recent-forum-topics	No

Joomla default template details : business_pro | author: Shape5.com | version: 1.0 | creationdate: August 2013

Kunena default template details : Blue Eagle5 | author: Kunena Team | version: 1.5.3 | creationdate: 2020-03-31

Kunena template params:

Warning: Spoiler!

DefaultCategoryicon
profileIconset	default
DefaultIconset	default
editorIconset	default
bootstrap	0
icomoon	1
tooltips	1
borderless	1
SubjectLengthMessage	80
fullactions	1
quick	0
displayMenu	1
displayDropdownMenu	1
displayDropdownContent	1
displayProfileBox	1
displayModule	1
displayBreadcrumb	1
displayAnnouncement	1
displayFooter	1
avatarPosition	top
avatarType	img-polaroid
labels	0
whoisonlineName	default
formRecover	0
topicicontype	image
fontawesome	0
socialshare	0
socialsharetag
socialtheme	classic
optional_username	0
writeaccess	0
localstorage	0
IconColor	inherit
IconColorNew	#48a348
forumHeadercolor	#48a348
announcementHeadercolor	#48a348
announcementBoxbgcolor
frontstatsHeadercolor
whoisonlineHeadercolor
inactiveTabcolor
activeTabcolor
hoverTabcolor
topBordercolor
inactiveFontcolor
activeFontcolor
forumLinkcolor	#48a348
enableSkinner	0
editor	0
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
supscript	1
subscript	1
numericlist	1
bulletedlist	1
alignright	1
alignleft	1
center	1
underline	1
italic	1
bold	1
strikethrough	1
colors	1
size	1
wysibb	bold,italic,underline,strike,sup,sub,justifyleft,justifycenter,justifyright,|,img,video,link,|,bullist,numlist,|,fontcolor,fontsize,fontfamily,|,quote,code,table,removeFormat
avatarSizeX	40
avatarSizeY	90
avatarSizeXThumb	90
avatarSizeYThumb	90
avatarSizeXWelcome	72
avatarSizeYWelcome	72
avatarSizeXList	36
avatarSizeYList	36
avatarSizeXPost	144
avatarSizeYPost	144
avatarSizeXProfile	200
avatarSizeYProfile	200
templatebyText
templatebyName
templatebyLink

Kunena version detailed: Kunena 5.1.19 | 2020-08-15 [ Tethys ]
| Kunena detailed configuration:

Warning: Spoiler!

Kunena config settings:
board_offline	0
enablerss	1
threads_per_page	30
messages_per_page	8
messages_per_page_search	15
showhistory	1
historylimit	6
shownew	0
disemoticons	1
template	blue_eagle5
showannouncement	1
avataroncat	0
catimagepath	category_images
showchildcaticon	0
rtewidth	450
rteheight	300
enableforumjump	1
reportmsg	1
username	0
askemail	1
showemail	0
showuserstats	0
showkarma	0
useredit	1
useredittime	3600
useredittimegrace	600
editmarkup	0
allowsubscriptions	1
subscriptionschecked	1
allowfavorites	1
maxsubject	50
maxsig	300
regonly	0
pubwrite	0
floodprotection	0
mailmod	1
mailadmin	-1
captcha	-1
mailfull	1
allowavatarupload	1
allowavatargallery	1
avatarquality	100
avatarsize	2048
imageheight	650
imagewidth	650
imagesize	1000
filetypes	doc,docx,txt,rtf,pdf,zip,tar.gz,tgz,tar.bz2
filesize	40000
showranking	0
rankimages	0
userlist_rows	30
userlist_online	0
userlist_avatar	1
userlist_posts	1
userlist_karma	0
userlist_email	0
userlist_joindate	0
userlist_lastvisitdate	0
userlist_userhits	0
latestcategory
showstats	0
showwhoisonline	0
showgenstats	0
showpopuserstats	0
popusercount	5
showpopsubjectstats	1
popsubjectcount	5
showspoilertag	0
showvideotag	1
showebaytag	0
trimlongurls	0
trimlongurlsfront	15
trimlongurlsback	10
autoembedyoutube	1
autoembedebay	0
ebaylanguagecode	en-us
sessiontimeout	1800
highlightcode	0
rss_type	post
rss_timelimit	month
rss_limit	50
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	asc
sef	1
showimgforguest	1
showfileforguest	1
pollnboptions	4
pollallowvoteone	1
pollenabled	1
poppollscount	5
showpoppollstats	1
polltimebtvotes	00:15:00
pollnbvotesbyuser	100
pollresultsuserslist	1
allow_user_edit_poll	0
maxpersotext	50
ordering_system	mesid
post_dateformat	datetime_today
post_dateformat_hover	datetime_today
hide_ip	1
imagetypes	jpg,jpeg,gif,png
checkmimetypes	1
imagemimetypes	image/jpeg,image/jpg,image/gif,image/png
imagequality	80
thumbheight	100
thumbwidth	100
hideuserprofileinfo	put_empty
boxghostmessage	0
userdeletetmessage	0
latestcategory_in	1
topicicons	0
debug	0
catsautosubscribed	0
showbannedreason	0
showthankyou	1
showpopthankyoustats	1
popthankscount	5
mod_see_deleted	0
bbcode_img_secure	text
listcat_show_moderators	1
lightbox	0
show_list_time	720
show_session_type	0
show_session_starttime	300
userlist_allowed	1
userlist_count_users	1
enable_threaded_layouts	0
category_subscriptions	post
topic_subscriptions	every
pubprofile	1
thankyou_max	10
email_recipient_count	0
email_recipient_privacy	bcc
captcha_post_limit	1
image_upload	registered
file_upload	registered
topic_layout	flat
time_to_create_page	1
show_imgfiles_manage_profile	1
hold_newusers_posts	0
hold_guest_posts	0
attachment_limit	8
pickup_category	0
article_display	full
send_emails	1
fallback_english	1
cache	1
cache_time	60
iptracking	0
rss_feedburner_url
autolink	1
access_component	0
statslink_allowed	0
superadmin_userlist	0
legacy_urls	1
attachment_protection	0
categoryicons	1
avatarresizemethod	1
avatarcrop	0
user_report	1
searchtime	365
teaser	0
ebay_language	3
allow_change_subject	1
max_links	20
read_only	0
ratingenabled	0
url_subject_topic	0
log_moderation	0
attach_start	20
attach_end	0
attachment_utf8	1
autoembedsoundcloud	1
emailheader	/images/2017/pgc_logo_for_open_graph.png
user_status	0
signature	0
personal	1
social	1
plain_email	0
moderator_permdelete	0
avatartypes	gif, jpeg, jpg, png
smartlinking	0
defaultavatar	nophoto.png
defaultavatarsmall	s_nophoto.png
quickreply	1
avataredit	0
activemenuitem
mainmenu_id
home_id
index_id
moderators_id
topiclist_id
misc_id
profile_id
search_id
avatar_type	0
sef_redirect	1
allow_edit_poll	1
use_system_emails	0
autoembedinstagram	1
disable_re	0
email_sender_name
display_filename_attachment	0

| Kunena integration settings:

Warning: Spoiler!

Kunena - Finder Disabled
Kunena - AltaUserPoints Disabled
Kunena - Community Builder Enabled: access=1 login=1 activity=1 avatar=1 profile=1 private=1
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:

Warning: Spoiler!

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

Third-party components: CommunityBuilder 2.4.5

Third-party SEF components: None

Plugins: Search - Kunena Search 5.1.2 | Content - Kunena Discuss 5.1.2

Modules: Kunena Latest 5.1.2 | Kunena Search 5.1.1

Something odd happened to the forum pages on my website some time between yesterday afternoon and this morning. The styles went completely awry. I eventually tracked the problem down to the file media/kunena/cache/blue_eagle5/css/kunena.css, which had no content. When I copied the content of the same file from a backup the styles were restored. However, within a few minutes the kunena.css file was empty again.

I've done a work round by copying the content of the backed-up version of kunena.css into a new file, which I've also called kunena.css but have uploaded to a different folder. I then copied the contents of com_kunena/template/blue_eagle5/assets/css/custom.css into the bottom of the new kunena.css and edited my main website template index.php file so that the new stylesheet is added when a Kunena page is loaded. But presumably this isn't an optimum solution?

I don't understand why the css cache file is being emptied of content. I did not make any changes to the website at yesterday or today before I encountered the issue. Any ideas?

I think you mean your user defined style is gone. I'm right? Changes in the cache make no sense because this data is constantly being updated.
If you want user defined changes do it in the custom.less or css.
You also don't need to adjust the template index.php, because Kunena finds the correct file itself if you edit the custom.css or less via the backend.
docs.kunena.org/en/manual/backend/templates/edit-less

Thanks Rich,

No, it was the exact opposite. My small number of custom styles in components/com_kunena/template/blue_eagle5/assets/css/custom.css were being applied, but no other Kunena-specific styles were present.

The kunena.css file in the cache folder was being updated, but every time was updated to just being empty.

However, I've now downloaded the Kunena installation package and run it and, after some clearing of caches, things are now working fine. So I guess it was a server problem. A corrupted file?

I should have done the reinstallation first before posting to the forum. Apologies for wasting your time!

It's no problem, we are happy to help. You're right, it seems this file has been corrupted. In this case it's the best way to remove the complete file, because if you remove the content from the cache, you need only a page refresh and a new kunena.css with content will be created.