TRAL does not find "Phobos result file"
TRAL 0.3.5 has bugs running and parsing Phobos. You can follow progress towards a fix on this issue: https://github.com/acg-team/tral/issues/16

Until the issue is fixed, you should remove Phobos from the repeat detector list in your tral config file (~/.tral/config.ini) and use a different repeat detector.

[sequence]
    [[repeat_detection]]
        DNA = TRED, T-REKS, TRF, XSTREAM