Unexpected token u in JSON at position 0

[burgossrodrigo]

truffle(testnet)> run verify ERC721PresetMinterPauserAutoId@0xefa55cd475be42f62e
21917dd208d4c341ff5d69 --debug
DEBUG logging is turned ON
Running truffle-plugin-verify v0.5.9
Verifying ERC721PresetMinterPauserAutoId@0xefa55cd475be42f62e21917dd208d4c341ff5
d69
Reading artifact file at C:\Users\Morang4\balance\build\contracts\ERC721PresetMi
nterPauserAutoId.json
Custom address 0xefa55cd475be42f62e21917dd208d4c341ff5d69 specified
Unexpected token u in JSON at position 0
Failed to verify 1 contract(s): ERC721PresetMinterPauserAutoId@0xefa55cd475be42f
62e21917dd208d4c341ff5d69

I'm getting this error can someone help?