Solved Can not edit previously posted topics

@Pinkeltje did you test this Joomla htaccess master file and it worked for you?

Well all other Joomla extensions components, modules and plugins working but not Kunena so thats an easy get away answer

By asking a volunteer to do the work for you?
Mine and many other Kunena installations are working without problems, so there is a bug in your site which you should find.

ssnobben wrote:

@Pinkeltje did you test this Joomla htaccess master file and it worked for you?
 

Did you test the default Joomla htaccess file as that is way easier to test then the other way around: your site keeps working with the default htaccess, our sites break using the 'advanced' one.

Ok here is anyhow the trace log:

404 View not found [name, type, prefix]: category, html, site
404 Not Found : You do not have permissions to access this page.

You may not be able to visit this page because of:
    an out-of-date bookmark/favourite
    a search engine that has an out-of-date listing for this site
    a mistyped address
    you have no access to this page
    The requested resource was not found.
    An error has occurred while processing your request.

If difficulties persist, please contact the website administrator and report the error below.
2025-08-14T06:43:48+00:00    CRITICAL 213.67.111.244    error    Uncaught Throwable of type Exception thrown with message "View not found [name, type, prefix]: category, html, site". Stack trace: #0 [ROOT]/libraries/kunena/src/Controller/KunenaController.php(386): Joomla\CMS\MVC\Controller\BaseController->getView()
#1 [ROOT]/libraries/kunena/src/Controller/KunenaController.php(323): Kunena\Forum\Libraries\Controller\KunenaController->display()
#2 [ROOT]/libraries/kunena/src/Controller/KunenaController.php(226): Kunena\Forum\Libraries\Controller\KunenaController->executeTask()
#3 [ROOT]/components/com_kunena/src/Dispatcher/Dispatcher.php(108): Kunena\Forum\Libraries\Controller\KunenaController->execute()
#4 [ROOT]/libraries/src/Component/ComponentHelper.php(361): Kunena\Forum\Site\Dispatcher\Dispatcher->dispatch()
#5 [ROOT]/libraries/src/Application/SiteApplication.php(217): Joomla\CMS\Component\ComponentHelper::renderComponent()
#6 [ROOT]/libraries/src/Application/SiteApplication.php(271): Joomla\CMS\Application\SiteApplication->dispatch()
#7 [ROOT]/libraries/src/Application/CMSApplication.php(304): Joomla\CMS\Application\SiteApplication->doExecute()
#8 [ROOT]/includes/app.php(58): Joomla\CMS\Application\CMSApplication->execute()
#9 [ROOT]/index.php(32): require_once('...')
#10 {main}
2025-08-14T06:44:09+00:00    CRITICAL 213.67.111.244    error    Uncaught Throwable of type Joomla\CMS\Router\Exception\RouteNotFoundException thrown with message "Page not found". Stack trace: #0 [ROOT]/libraries/src/Application/SiteApplication.php(767): Joomla\CMS\Router\Router->parse()
#1 [ROOT]/libraries/src/Application/SiteApplication.php(243): Joomla\CMS\Application\SiteApplication->route()
#2 [ROOT]/libraries/src/Application/CMSApplication.php(304): Joomla\CMS\Application\SiteApplication->doExecute()
#3 [ROOT]/includes/app.php(58): Joomla\CMS\Application\CMSApplication->execute()
#4 [ROOT]/index.php(32): require_once('...')
#5 {main}

Tested also with Joomla standard .htaccess file and Kunena doesnt work with Joomla standards htaccess file and multilanguage site.. hmmm

Kunena doesnt work with Joomla standards htaccess file and multilanguage site

There must be something seriously wrong with your site. Kunena does work with default Joomla .htaccess and multilanguage.