Hello, I did a fresh install yesterday.
All updates are done, but when I click on “Backup configuration” I get the message
 Undefined class constant 'FORM_ENC_MULTIPART'
See the system log for details.
In the /var/log/httpd-admin/error_log I see
[Sat Sep 09 11:53:16.113687 2017] [:error] [pid 1853] [client 192.168.0.10:2919] PHP Fatal error: Undefined class constant 'FORM_ENC_MULTIPART' in /usr/share/nethesis/NethServer/Template/BackupConfig/Upload.php on line 4, referer: https://192.168.0.254:980/en-US/PackageManager
I’ve posted here because it seems the same bug.