SSE script giving Connection Timeout

I have written SSE connection script using gatling but when I am running the same ,i am getting errors like “ConnectCheck timeout” but when i am actually running this with substring matches , it is not giving any errors.

I’d say that the url you’re targeting doesn’t reply with a SSE stream but with a regular HTTP payload.

Anyway, impossible to tell as long as you don’t provide a means to investigate: a reproducer as required here.