Hi @Matt_W, thanks for the post. Are you attempting to connect to a nested frame? If so, unfortunately, this feature is currently unavailable.
However, some community members have suggested a workaround for this, which you might find valuable. You can explore the discussion here: Creating a connection to a nested frame - #5 by MattyH.
Additionally, there is a feature request post for this, and you can show your support by upvoting it here: Link to nested frames.
I hope these help but please let us know if you have further questions!
Thanks,
toku