I'm trying to update the Manager System.
I have Internet connection to the device.
When I just clicked the button 'Install Updates', the text "Invalid file or file not found" suddenly appears although I haven't proceed to select any file, enter a URL, or click the 'Check for Updates' button.
I did try all of the 3 ways to update the Manager.
First, the Manager System refreshed when I clicked a) upload the local file or b) download from url.
Second, a message "Could not establish connection with server" appeared when I clicked 'Check for Updates' button.
I'm not quite sure whether it is about device's network interfaces.
I made some changes on the hostname below message appeared after restarted.
It seems to me that some files are missing.Back to factory presets
Warning: file(/etc/network/interfaces.default) [function.file]: failed to open stream: No such file or directory in /mnt/lib/var/www/ManagerSystem/core/API/parser_interfaces.php on line 20
Warning: Invalid argument supplied for foreach() in /mnt/lib/var/www/ManagerSystem/core/API/parser_interfaces.php on line 33
Do you think I should perform the rescue process?