Solved View kunena menu-items on joomla 5 give 3 items a error

I tried that locally but the problem still persists
 

Ok, now I saw the error and added a ticket on Git.

For testing I have added in /libraries/vendor/joomla/filesystem/src/path.php the three lines
if (!\is_string($path)) {
            throw new \InvalidArgumentException('You must specify a non-empty path to clean');
        }
disabled by two preceding backslashes:
// if (!\is_string($path)) {
//             throw new \InvalidArgumentException('You must specify a non-empty path to clean');
//       }

After that, the error no longer occurred.
I haven't tested yet if there are any negative effects from this.

gindi

Yes, that works, but I don't know if this
is a problem of Joomla 5.
The error only occurs when I view/edit kunena menu items
the Joomla menu items don't have that problem.

That's right. But the error message comes from /libraries/vendor/joomla/filesystem/src/path.php, there is no mention of Kunena.
In the database there are no menus for kunena but in xxx_menu there are the kunena menus.
I also compared the database entries of the (Kunena) menus in Joomla 4.4.0 and Joomla 5.0.0. They are absolutely identical.
So the problem must be with Joomla.
I have described the case in the Joomla forum, maybe they know a solution there.

Gindi

I've created a pull request for this problem on GitHub. However, for those who urgently need a fix, you can follow these steps:

1. Go to the 'default.xml' file located at [joomla_installation_dir]/components/com_kunena/tmpl/user/tmpl/default.xml.
2. Copy the 'default.xml' file.
3. Paste it one level up in the directory at [joomla_installation_dir]/components/com_kunena/tmpl/user.

Repeat these steps for all the affected menu items, which include:

• Moderator Topics
• Edit User
• General Statistic
• Search
• Unread
• User list
• Profile

if I look again at folder structure
it seems to me that, for example, that in folder search
there is a folder tmpl again and it contains the default.xml
If I copy it one level up, \components\com_kunena\tmpl\search\ then view the menu works

I have copied all the specified .xml files in the specified directories one level up and all the menu items can be edited.
Well done, thank you.

Gindi