Many Actions from Zoho Books Stopped Working this week!

Many Actions from Zoho Books Stopped Working this week!

Zoho,

1. We have been using the Zoho Books "Update customer in Zoho Books" action for years without issues. Below is the action. When we don't have an email address, we update the email address on file as noemail[at]gmail.com
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HOWEVER, starting a few days ago in Zoho Flow, every time this action runs, it returns an error: "Zoho Books says "Cannot delete contact person as it is linked to Zoho CRM Account."
 Why is there any error about deleting a contact?? I'm not deleting a contact at all. I'm just updating the customer like I have been doing for years!! 
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2. Fetch Bill is NO LONGER returning anything when searching by ID.
Below is from yesterday. These actions have worked every week without issues for years, but yesterday, they no longer work!

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Here you can see this bill and it's the same ID as searched for above.


This action ran for 40 different flows yesterday, all of them with valid Bill ID's and for EVERY SINGLE ONE, THE OUTPUT WAS EMPTY!!!!

We have a LOT of automation that has relied on this working. Why did it stop working! This is SOOOO frustrating! FIX THIS ASAP!!!!!!!!!!