React-native ios simulator fetch request error Network request failed, configured xcode or error

1. Question:

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2xcodehttp:

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:
:

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xocode:
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react-native:

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Please all the great gods to answer!

Feb.28,2021

has been solved:
the process is rather bumpy, thinking that the react-native version is too high, but after changing it to "0.44.0", I can't run directly. I found a lot of solutions on the Internet, changed it back and forth, maybe the things in the ios folder were broken, and finally.
again react-native init Project -_ -\\
copy the previous configuration and files, and then you can run. According to the general method given by everyone, the problem has been solved!

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