cannot run

[yanganggithub]

Error output from CocoaPods:
↳
Ignoring digest-crc-0.6.1 because its extensions are not built. Try: gem pristine digest-crc
--version 0.6.1
Ignoring ffi-1.12.2 because its extensions are not built. Try: gem pristine ffi --version
1.12.2
Ignoring unf_ext-0.0.7.7 because its extensions are not built. Try: gem pristine unf_ext
--version 0.0.7.7

[!] `<PBXGroup UUID=`97C146E51CF9000F007C117D`>` attempted to initialize an object with an
unknown UUID. `CF3B75C9A7D2FA2A4C99F110` for attribute: `children`. This can be the result of
a merge and the unknown UUID is being discarded.

[!] Automatically assigning platform `iOS` with version `8.0` on target `Runner` because no
platform was specified. Please specify a platform for this target in your Podfile. See
`https://guides.cocoapods.org/syntax/podfile.html#platform`.

Error running pod install
Error launching application on iPhone 12.

ganhaideMacBook-Pro-2:flutter_vscode ganhai$ sudo gem pristine --all
Password:
Ignoring digest-crc-0.6.1 because its extensions are not built. Try: gem pristine digest-crc --version 0.6.1
Ignoring ffi-1.12.2 because its extensions are not built. Try: gem pristine ffi --version 1.12.2
Ignoring unf_ext-0.0.7.7 because its extensions are not built. Try: gem pristine unf_ext --version 0.0.7.7
Restoring gems to pristine condition...
ERROR: While executing gem ... (Gem::FilePermissionError)
You don't have write permissions for the /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/gems/2.6.0 directory.