Add the following codes behind the Podfile:
[!] CDN: trunk Repo update failed – 34 error(s):

source 'https://github.com/CocoaPods/Specs.git'

First, you have to execute the following commands

git clone https://github.com/CocoaPods/Specs.git ~/.cocoapods/repos/master

Then view the pod repo list

remove the selected
by executing pod repo remove trunk. Finally, execute pod install

If this problem occurs

just change the platform in podfile: IOS, ‘13.0’
adapt to the IOS version of cocoapods