karma fails for ng test --code-coverage without proper error message after upgrading from angular 8 to angular 11.2.4

**My package.json below for karma** [](url)

**My Error->**

Similar Error like Error thrown in afterAll [object Object]

Banging my head on this issue from the past 2 weeks, still no success.

Have recently updated Angular 8 to Angular 11.2.4.

I have total of 1000+ test cases which are failing randomly , but when runs individually it works.

Need help on this issue