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!

React-native xcode
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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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b2ba36-2b22a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b2ba36-2b22a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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