Xcode Build Failed - Undefined symbols for architecture arm64

[modernjesus1]

"ClassDB::bind_methodfi(unsigned int, MethodBind*, char const*, Variant const**, int)", referenced from:
      FirebaseAnalytics::_initialize_classv() in firebase-analytics.a(firebase_analytics.o)
ld: symbol(s) not found for architecture arm64

I generated headers for 3.5.1. I don't have any problem with other ios plugins (IAP, Facebook, Admob)

Godot version: Godot 3.5.1

[kdlee]

Seems like an old issue, but in case it helps anybody,

Ran into the same issue while trying to make this plug in work for Godot 4.2.1
It happens if there is a debug/release mismatch between Godot & the plugin.
Make sure you're using debug Godot with debug plugin and release Godot with release plugin.