In XCode, update (Sphinx) Targets > Signing & Capabilities > Keychain Sharing with the Keychain Group

In file sphinx/Managers/Keychain/KeychainManager.swift update the Keychain Group value with the new Keychain Group From above
public static let kKeychainGroup = "2M14MLERC9.com.zataara.dev.test"
In the file sphinx/sphinx.entitlements update with the correct Keychain Group value.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "<http://www.apple.com/DTDs/PropertyList-1.0.dtd>">
<plist version="1.0">
<dict>
<!-- <other values here> -->
<array>
<string>2M59XHHFF5.com.zataara.dev.test</string>
</array>
</dict>
</plist>
Note:
Do not add the above changes (or any other Team specific updates) to your Pull Requests. Use either a local .gitignore file or the below option to ensure these changes stay local only.
git update-index --skip-worktree sphinx/Managers/Keychain/KeychainManager.swift
git update-index --skip-worktree sphinx/sphinx.entitlements