It seems that you have employed saveNBO keyword. I don't know why you use it, if you want to visualize NBO orbitals, the best way in my opnion is using Multiwfn (http://sobereva.com/multiwfn), in this case using saveNBO is not the only choice, you can ask NBO module to generate NBO plot files and then use Multiwfn to plot NBOs based on these files, see Section 4.0.2 of Multiwfn manual on how to very easily realize this. If you do not need to visualize NBO orbitals, simply remove saveNBO, then this problem will be solved.