Uncaught TypeError: Cannot read property 'Crashlytics' of undefined - ionic1 1.2.4

[acipher]

I am using this plugin in ionic1 1.2.4

in app.js file i have added crash log like.
window.fabric.Crashlytics.addLog("about to send a crash for testing!"); window.fabric.Crashlytics.sendCrash();

I have followed the steps given in plugin but getting Uncaught TypeError: Cannot read property 'Crashlytics' of undefined

here is my ionic info

[vovkind]

Same issue with Cordova. Do we have a fix/workaround there?