TypeError: backend.releases is not a function

[baconbrad]

I am using something like:

const Pecans = require("@dopry/pecans").Pecans;
const pecans = new Pecans(config.updates);
app.use('/updates', pecans.router);

And I am getting:

this.releasesCache[this.getCacheKey()] = backend.releases();   
                                                         ^
TypeError: backend.releases is not a function
    at new Pecans

I am not too familiar with TypeScript to debug it further but it is causing Pecans to not work completely. My config.updates is valid and works with Nuts. Can I have some assistance in resolving this issue? Thanks.