Error parsing objects and arrays as elements of an array

The folowing json5 string:

    {a:1,b:'j',c:[1,[1],{a:1},],d:{a:1,},}

Parses correctly using the javascript version of json5, on cli, installed through npm

    npm install --global json5

but fails parsing with the dll built on visual studio 2017 from this json5-dotnet repository using

    Json5.Json5.Parse("{a:1,b:'j',c:[1,[1],{a:1},],d:{a:1,},}");