@dimalifragis Thanks. I know, that have lots of plugins, now I trying to cut them, but still, as I write before, when I disabled them all, wpforo still not working well.

And also was chexking for linka "community", but it seems to mé that wpforo some how create that link on his own.

All the time, when I delete all cache, paged, etc., look at the settings, everything is fine, set the main page, púť there [wpforo] and try it, it work. I login, click on profile, and it is fine, but on Second click, page just s**t down and then, when I look in wordpress pages, there is created new page with community. Then community-2, etc., so I think, you are right that some problém is there, but dont know how to find it.

And with Debug log, if I am understanding right, it mean, that I need to go write some vode in my wordpress theme? 🤔 Base on likyou send? 

@dimalifragis Thanks man a lot. I will try it as you write and look at Debuging and hope to find something which could help mé undersetand problem or solved it. 🙂 

@dimalifragis so I try Our advice, and install Debuging plugin for look et errors in wordpress, and it piť some error already, when I click on forum. 

But I dont understnad them, so Will be looking at them later in thay, when I come home, but I copy some of them from Debuging message, maybe you can undersetand something. 

SELECT *

FROM wh20771_wpforo_boards

WHERE `status` = '1' 

wpforo\classes\Boards->_get_boards

0,0007

135 SELECT *

FROM wh20771_wpforo_boards

WHERE `status` = '1'

AND `slug` IN('participant')

AND `pageid` IN(15794)

ORDER BY ( `locale` = ''

OR `locale` IS NULL ) ASC, `boardid` DESC

LIMIT 0,1 

wpforo\classes\Boards->_get_board

0,0003

136 SELECT *

FROM wh20771_wpforo_boards

WHERE ( `locale` = ''

OR `locale` IS NULL

OR `locale` LIKE '%sk\_SK%' )

AND `status` = '1'

AND `slug` IN('participant')

ORDER BY ( `locale` = ''

OR `locale` IS NULL ) ASC, `boardid` DESC

LIMIT 0,1 

wpforo\classes\Boards->_get_board

0,0003

137 SELECT *

FROM wh20771_wpforo_boards

WHERE `status` = '1'

AND `is_standalone` = '1'

ORDER BY ( `locale` = ''

OR `locale` IS NULL ) ASC, `boardid` DESC

LIMIT 0,1 

wpforo\classes\Boards->_get_board

0,0002

138 SELECT *

FROM wh20771_wpforo_boards

WHERE `boardid` IN(0)

ORDER BY `boardid` DESC

LIMIT 0,1 

wpforo\classes\Boards->_get_board

0,0002

144 SELECT *

FROM wh20771_wpforo_boards

WHERE `status` = '1'

AND `slug` IN('participant')

AND `pageid` IN(15794)

ORDER BY ( `locale` = ''

OR `locale` IS NULL ) ASC, `boardid` DESC

LIMIT 0,1 

wpforo\classes\Boards->_get_board

0,0004

145 SELECT *

FROM wh20771_wpforo_boards

WHERE ( `locale` = ''

OR `locale` IS NULL

OR `locale` LIKE '%sk\_SK%' )

AND `status` = '1'

AND `slug` IN('participant')

ORDER BY ( `locale` = ''

OR `locale` IS NULL ) ASC, `boardid` DESC

LIMIT 0,1 

wpforo\classes\Boards->_get_board

0,0002

146 SELECT *

FROM wh20771_wpforo_boards

WHERE `status` = '1'

AND `is_standalone` = '1'

ORDER BY ( `locale` = ''

OR `locale` IS NULL ) ASC, `boardid` DESC

LIMIT 0,1 

wpforo\classes\Boards->_get_board

0,0003

147 SELECT *

FROM wh20771_wpforo_boards

WHERE `boardid` IN(0)

ORDER BY `boardid` DESC

LIMIT 0,1 

wpforo\classes\Boards->_get_board

0,0002

Total: 9 / 172

Another message:

Warning Zend OPcache can't be temporary enabled (it may be only disabled till the end of request) 1 

Unknown:0

@jaroslav-lachky No, do NOT UNINSTALL anything.

Just DISABLE the Plugin, and then Delete it. DO NOT UNINSTALL. And just in case make a DB backup.

After deleting the wpForo plugin, install it and activate it. Nothing is lost.

Also use the wpForo tools to check if everything is ok.

If not, then ask wpForo support to login to your site and help you out.