sample chapter-09 16-animation-from-gltf, can not read "match" of undefined

[polyren]

This problem prevents me from opening this example, I have tried to replace the model with different glTF 2.0 files, but the same error exists. I'm using npm and python simple server to open the example.

error message here.

Uncaught TypeError: Cannot read property 'match' of undefined
at Object.value (glTF-parser.js:91)
at Object.value (glTF-parser.js:97)
at Object. (glTF-parser.js:113)
at Array.forEach ()
at Object. (glTF-parser.js:111)
at Array.forEach ()
at Object.value (glTF-parser.js:107)
at Object.set [as json] (glTF-parser.js:133)
at XMLHttpRequest. (glTF-parser.js:276)

[fuzzy-duck]

I'm getting the same...any ideas?