Edit History

I just discovered that the error log of my website it's full of line like these:

 

[Thu Sep 24 16:00:43 2015] [warn] [client 66.249.79.158] mod_fcgid: stderr: PHP Notice:  Trying to get property of non-object in /var/www/vhosts/dottorgadget.it/store.dottorgadget.it/cache/smarty/compile/05/08/c2/0508c2f91254ff08e0f0e68fca411f98fb53bc0c.file.nav.tpl.php on line 59
[Thu Sep 24 16:00:55 2015] [warn] [client 207.46.13.154] mod_fcgid: stderr: PHP Notice:  Undefined index: order_process in /var/www/vhosts/dottorgadget.it/store.dottorgadget.it/cache/smarty/compile/05/08/c2/0508c2f91254ff08e0f0e68fca411f98fb53bc0c.file.nav.tpl.php on line 59
[Thu Sep 24 16:00:55 2015] [warn] [client 207.46.13.154] mod_fcgid: stderr: PHP Notice:  Trying to get property of non-object in /var/www/vhosts/dottorgadget.it/store.dottorgadget.it/cache/smarty/compile/05/08/c2/0508c2f91254ff08e0f0e68fca411f98fb53bc0c.file.nav.tpl.php on line 59
[Thu Sep 24 16:01:06 2015] [warn] [client 95.211.238.106] mod_fcgid: stderr: PHP Notice:  Undefined index: order_process in /var/www/vhosts/dottorgadget.it/store.dottorgadget.it/cache/smarty/compile/05/08/c2/0508c2f91254ff08e0f0e68fca411f98fb53bc0c.file.nav.tpl.php on line 59

I have at least 10 lines like these every minute.

 

Where I have to look to trying find out what wrong?