Undefined symbols for architecture arm64: CLSBetaController block invoke in Crashlytics(CLSBetaController.o)

Question

Hello Guys I have updated the pod files today in my projects and I saw Crashlytics got updated from 3.8.3 to 3.8.4. After installation I am trying to run the project but I am seeing this error & unable to build the project.

In Terminal

Installing Crashlytics 3.8.4 (was 3.8.3)

In Xcode Issues

Undefined symbols for architecture arm64:
  "_FABNetworkMaximumRetryCount", referenced from:
      ___51-[CLSBetaController loadUpdateWithCompletionBlock:]_block_invoke in Crashlytics(CLSBetaController.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

Open Podfile Source code

Remove the fabric & Crashlytics pods

pod 'crashlytics' 
pod 'Fabric'

Install pods

pod install

Both Fabric and crashlytics pods will be removed.
Open the Podfile once again and Add both pods as shown below

pod 'crashlytics' 
pod 'Fabric'

Install pods once again

pod install

`Finally update Run script

Select Project >> Select Target >> Build Phrases >> Under Run Script

"${PODS_ROOT}/Fabric/run" YOUR_API_KEY YOUR_BUILD_SECRET