Hello Ray,
We made quite some changes in the UI recently and eventually removed some older (undocumented, "internal") calls. This was one of them. Apologies if this causes you grievance.
You have three alternatives - I'm assuming you're really after basic probe data, in particular coordinates:
1. Use the probes API: /api/v2/probes/ for info about multiple probes or a single one
3. There's an alternative internal call with similar data to that original one, which we heavily use internally from now on. I can give you the URL if you insist :-) but this is subject to unannounced changes
Regards,
Robert