'Looking for Help to fix Angular 8 to 9 Upgrade issue - Getting error in tab.js file

Once try to access the app in browser its keep on loading and throwing 500 -1000 errors in tabs.js file. (this._tabList.nativeElement is coming as empty). We are using Mat-tab in our project. Looks like material design is causing this issue

angular angular-material2

Solution 1:^[1]

looks like your anguler/material is still at 7. Try to upgrade it to 9.

https://update.angular.io/?v=7.2-9.0

click "I use material" option then you'll get a list of things you need to do to upgrade it.

Sources

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Source: Stack Overflow

Solution	Source
Solution 1	Can Geylan