AVE installation progress Failed 10 of 70

i'm trying to install AVE 18.1, but it always fails at step 10 of 70, help me please. "grep "10\.8\.150\.129" /etc/hosts", exit status=1 (error) Grepping internal IP address failed with return code: '1' and output: '[]'  Retry Current Task, Call Support Updating User Configuration File (10 of 70) Failed