The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.4.99. (in target 'gRPC-C++' from project 'Pods')
# Instead of specifying a deployment target in pod post install, you can
# delete the pod deployment target, which causes the deployment target to be
# inherited from the podfile platform. In Xcode, navigate to Pods > Podfile and
# add the code below:
platform :ios, '12.0'
post_install do |installer|
installer.pods_project.targets.each do |target|
target.build_configurations.each do |config|
config.build_settings.delete 'IPHONEOS_DEPLOYMENT_TARGET'
end
end
end