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It did run OK on PSSe v.33.12.1 with Python 2.7.13 and Scipy 0.16.1 (32 bit):

       1000 BUS POWER SYSTEM SIMULATOR--PSS(R)E-33.12.1

             INITIATED ON THU, NOV 14 2019   9:45
('min value:', -0.18814357989751096)
('solution:', array([0.29250894, 1.84897232, 1.84897233]))
('success or not:', True)
('message:', 'Optimization terminated successfully.')

If you got Spyder (and Scipy) with Anaconda 64-bit, uninstall and install the 32-bit version.