Unable to read file size of 71.1Mb

[T-Deepthy]

Getting Error

TypeError: Cannot convert undefined or null to object
at Function.keys ()
at FileReader.reader.onload (analytics-analytics-module.js:14073)
at ZoneDelegate.invoke (polyfills.js:2900)
at Object.onInvoke (vendor.js:70612)
at ZoneDelegate.invoke (polyfills.js:2899)
at Zone.runGuarded (polyfills.js:2669)
at FileReader. (polyfills.js:2653)

On uploading a file of greater size, eg 70mb its not reading and showing error.
How can I reslove this..?

[reviewher]

There are a number of issues involving reading large files. If you can share a sample, please post a reply at #61