XF 1.4 Error Disk Space MySQL

[Sinyomualim]

please help,
i found error on my xenforo.
error say about space is full

but, actually space is free more,

please help me,
what i must doing to solve this eror.
now i can;t klik 'Display Node Tree"

 

[TPerry]

If you are on shared hosting, it's something your hosting provider needs to address as it's the /tmp directory that needs to be emptied. On a shared hosting environment, your control panel will NOT show the area in question for free space as that is a system value, not a shared account one.
If it's on your own server, then a reboot will temporarily solve the issue, but you still need to find out what is filling up the /tmp directory.