Answers for "animated node with tag 2 does not exist"

Animated node with tag 1 does not exist

if you tryed to upgrade app to sdk 41 or above this mite help
https://github.com/expo/react-native/archive/sdk-40.0.0.tar.gz

animated node with tag 2 does not exist

If you are using expo, execute below command 
"expo upgrade"

this will upgrade/downgrade the package versions as per the supported versions.