So, I've also got this problem.
I've read some about it here on the forums, but still can't get it to work. Basically it tells me that my /tmp folder isn't within the allowed path(s). I've tried some different commands like
define('WP_TEMP_DIR','/tmp');
define('WP_TEMP_DIR', ini_get('upload_tmp_dir'));
putenv('TMPDIR=' . ini_get('upload_tmp_dir'));
putenv('TMPDIR=/path/to/my/web/hosting/directory/www/tmp/');
well, think that's all... and none of those work. What am I doing wrong? As far as I can tell the path to my root is:
/usr/local/pem/vhosts/my_account_number
and the path for my httpdocs is:
/usr/local/pem/vhosts/my_account_number/webspace/httpdocs
I'm httpdocs I've created a tmp folder with the correct attributes, and now I try to link it, but it won't work... I've tried alot of different options, and now I come to you for help.