Unity Chartboost adapter error when building Xcode

[haru-sudo]

[REQUIRED] Step 1: Describe your environment

• Unity version: 2021.1.18f1
• Google Mobile Ads Unity plugin version: 6.0.2
• Platform: iOS (iOS, Android, Unity Editor)
• Platform OS version: iOS14 (eg iOS 10, Android 9)
• Mediation ad networks used, and their versions:Chartboost Version 3.3.1

[REQUIRED] Step 2: Describe the problem

Steps to reproduce:

First, install the Google Mobile Ads Unity plugin 6.0.2. Next, add Chartboost Unity Mediation Plugin 3.3.1. Then build the iOS build. After that, if you try to build it with Xcode, you will get an error.

[haru-sudo]

Was self resolved.