Sending a text message on an Android phone causes a Runtime Error

[gordonlu310]

Try to export your project and upload it in the server used in here.

Runtime Error: Targeting S+ (version 31 and above) requires that one flag of FLAG_IMMUTABLE be specified[...]

I have deployed a temporary server where you can test the issues related to FLAG_IMMUTABLE in the built-in components here. Extension authors will still need to separately update their extensions to be compatible with Android S.