TypeError: this.props.onIncrement is not a function

I keep getting this error. I tried to figure it out, but I stuck( Please help!

The most ugly and unpleasant errors that happens in codes are syntactical errors, and sometimes it’s really hard to find them :smiley:
Look at line 46 of the App.js component, you misspelled “onincrement” instead of “onIncrement

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Thank you. I really appreciate your help)