pod install fails with Xcodeproj unknown attributes and FrozenStringError in Flutter iOS project

**Environment**:
- macOS Sonoma
- Xcode 14.5
- CocoaPods 1.15.2
- Flutter 3.0 (if applicable)

**Issue Description**:
Encountered multiple errors while running `pod install` in the iOS directory of my Flutter project that integrates Firebase. I am using Visual Studio Code as my IDE.

**Steps to Reproduce**:
1. Open terminal in Visual Studio Code.
2. Navigate to the iOS directory of the project.
3. Execute `pod install --repo-update`.

**Expected Behavior**:
Pods should install without errors, updating the project dependencies accordingly.

**Actual Behavior**:
Received errors related to unknown attributes in Xcodeproj and a FrozenError when CocoaPods attempted to report the error. The detailed error messages are:
- `[!] Xcodeproj doesn't know about the following attributes {"minimizedProjectReferenceProxies"=>"1"} for the 'PBXProject' isa.`
- `FrozenError: can't modify frozen String`

**Error Messages**:
[!] Xcodeproj doesn't know about the following attributes {"minimizedProjectReferenceProxies"=>"1"} for the 'PBXProject' isa.
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/user_interface/error_report.rb:34
`force_encoding': can't modify frozen String (FrozenError)

**Attempts to Resolve**:
- Updated CocoaPods to the latest version.
- Checked Xcode compatibility, no issues found on CocoaPods and Xcode release notes.

Please advise on a resolution or workaround