Unexpected error: Cannot read property ‘startsWith’ of undefined

[scheyal]

setup

• simple node.js empty bot
• add qna kb's luis dialog, orchestrator on top
• few simple language intents, triggers

repro

Hit the duplicated intent recognized condition and then that error showed up (see visual below)

visual

error in emulator

bot general structure

[taicchoumsft]

The root cause was located in getTopScoringIntent, where it is possible in the nodejs version to return an undefined value. In the dotnet implementation the function always returns a string.

At some point, the CTRS (crosstrainedrecognizerset) IsRedirect function is called, which expects a string, causing the uncaught exception.