It seems you are trying to access the "ReactNative.createClass" from the "reactive" package,

Question

Anyone who met this error can help me. I do not understand why this error occurred in my program

Answer 1

The error message is straight forward. If you cannot change it manually, you can use CodeMod ( https://github.com/sibelius/codemod-RN24-to-RN25 )

If all your data is correct, check third-party modules. If you are in the old version, update third-party modules.

Answer 2

The error is very descriptive - you are importing Reactfrom a package react-nativethat has been incorrect since version 0.25.

:

import React, { Component, View, Text } from 'react-native' 

:

import React, { Component } from 'react'
import { View, Text } from 'react-native'

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