/tmp used 100% where is files?
You should use lsof /tmp to see currently opened file.
If you delete a file, while a software still have a lock on it, you won't see it anymore, but it will still have hd space assigned to it.
That's a very small /tmp partition.
Show the output of lsof /tmp to see which processes have open files there. Stopping the relevant process should free the space.