You need to create a folder called /home/nightclo/tmp, and set the permissions to 0x777. If you use ftp to upload your files to your server, you should be able to do it using your ftp program. If you can't figure it out, tell us what ftp program you're using and someone might be able to walk you through it.
When that's done, follow the rest of the instructions that Wayne posted in post# of this link:
https://www.vbulletin.com/forum/show...-tempnam%28%29 (the second one you posted). He's refering to settings in the vbulletin adminCP, under the "Server Settings and Optimization Options" section.