Error: Method 'addPostFrameCallback' cannot be called on 'SchedulerBinding?' because it is potentially null

I am going to talk about, How to solve this type of error "Error: Method 'addPostFrameCallback' cannot be called on 'SchedulerBinding?' because it is potentially null" this error comes in Flutter 3.0

- You can solve this error easily...How

The simple step is to downgrade your flutter version from 3.0 to 2.10.2

Wow...Solved your problem

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