Cannot read property 'attr' of null

[zimbolis]

Hi, this happened when trying to convert an svg:

/usr/local/lib/node_modules/smil2css/lib/convert.js:18 var style = _data.target.attr("style"); ^

TypeError: Cannot read property 'attr' of null at appendAnimationToShapes (/usr/local/lib/node_modules/smil2css/lib/convert.js:18:27) at module.exports (/usr/local/lib/node_modules/smil2css/lib/convert.js:70:2) at smil2css.convert (/usr/local/lib/node_modules/smil2css/lib/index.js:55:4) at Function.smil2css.convert (/usr/local/lib/node_modules/smil2css/lib/index.js:30:18) at module.exports (/usr/local/lib/node_modules/smil2css/lib/cli.js:192:36) at Object. (/usr/local/lib/node_modules/smil2css/bin/index:3:22) at Module._compile (module.js:569:30) at Object.Module._extensions..js (module.js:580:10) at Module.load (module.js:503:32) at tryModuleLoad (module.js:466:12) input.svg --/Users/user/Desktop/output.svg -c