Sorry but its not available in my project screen. Maybe the chat feature is available in few regions.
I am accessing the site from India, I don’t see any such chat bubble.
Just open any project in the design screen or the block screen and you should see the chat bubble. The aim is to talk to the support regardless of the project you open. Once you talk to them, give the details of the project which you have the error.
The chat feature is available to all. Remember it’s Sunday so you might only get a response on Monday USA time.