The Project IDs field on the Bug: Zoho Flow > Zoho Books > Action: Update Recurring Invoice form does not work. I can update other fields for the same recurring invoice without issue. When I try to add a project that belongs to the same customer as the recurring invoice it gives an error:

You'll also note the grammar error "'s" servers.

I can add a project manually to an invoice, remove the project but Zoho Flow cannot add it (nor any project to the recurring invoice). Here is a screen shot of the field I'm referencing (I've tried both entering the project ID and selecting project from the drop down):

I've tried changing the connection and that did not work. I was able to update other fields on the same recurring invoice without issue.