TypeError: string indices must be integers

[vargas2000]

awa@awa:~/sshprank$ sudo ./sshprank.py -m '-p22 --rate=10000 -iL a.txt' -u admin -p admin -x 100 -X 100 -o global.txt __ __ / / ____ _________ _____ / / / / / __ / __ / / __ `/ __ / /// ( | ) / / / // / / / // / / / / ,< //// // .// _,// ///|| //

  --== [ by nullsecurity.net ] ==--

[+] game started [+] scanning and cracking targets [/] scanning sshds [+] game over Traceback (most recent call last): File "./sshprank.py", line 720, in main(sys.argv[1:]) File "./sshprank.py", line 681, in main crack_scan() File "./sshprank.py", line 577, in crack_scan targets = grep_service(future.result()) File "./sshprank.py", line 372, in grep_service for h in scan.scan_result['scan'].keys(): TypeError: string indices must be integers