Steps to reproduce:

1. get tablespace statistics - Oracle by ODBC : Oracle: Get tablespaces stats

Result:

Resolution:

Aditonal grants:

GRANT SELECT ON dba_free_space TO zabbix_mon;
GRANT SELECT ON v_$parameter TO zabbix_mon;
GRANT SELECT ON dba_temp_files TO zabbix_mon;
GRANT SELECT ON gv_$sort_segment TO zabbix_mon;