Getting lexical or preprocessor issue in Xcode 12.2 build

Hi, I am using ionic 1 cordova. while taking a build for iOS in Xcode 12.2 I am getting lexical or preprocessor issue of 'FirebaseCore/FirebaseCore.h file not found'. I am using cordova-plugin-firebasex plugin version 6.1.0 and Mac OS 10.15.7.

Getting lexical or preprocessor issue in Xcode 12.2 build
 
 
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