After Upgrading CocoaPods Framework Received NameError

After upgrading Cocapods to 1.9.3 have received the following message:

NameError — uninitialized constant Pod::Target::BuildType
Did you mean? Pod::BuildType
/Users/aurimas/projects/exit-entry/mobile/ios/Podfile:14:in `build_type’
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/target.rb:112:in `build_as_framework?’…