Karma + Jasmine Tests Failing for logdown (Angular)

[AhsanAyaz]

I was able to successfully integrate logdown to the app and it works brilliantly. Thanks to the index.d.ts.
However, now all of my tests are failing and saying:

ERROR in src/classes/LoggerManager.ts (2,8): Module '"node_modules/logdown/index"' has no default export.

I spent some time trying to modify the index.d.ts to see if things could work, but whatever I did result in some other error.
Any idea what may be wrong?