I have a script that runs in Illustrator and needs to send progress information to a ScriptUI user interface running in Extendscript Toolkit. Since Illustrator 2022, the function call BridgeTalk.getSpecifier( "estoolkit") returns null. As a result, my script is unable to send messages to Extensscript Toolkit. My workaround has been to use Illustrator 2021, where this functionality still works. It works in Illustrator 2020 & 2021 but does not work in Illustrator 2022 & 2023.