Can't call method "do" on an undefined value

Hi,

My server has: Ubuntu 16.04,  Apache/2.4.18, mod_perl/2.0.9, Perl/v5.22.1 and PHP 7.0 .

Whe i send inventory from a client, from localhost or any other client the server shows me this on the Error.log of apache:

[pid 1143] [client 127.0.0.1:58674] Can't call method "do" on an undefined value at /usr/local/share/perl/5.22.1/Apache/Ocsinventory/Server/System.pm line 177.\n

And the inventory info dont arrive to the server.

Thanks.