There has been a recent change to the Places API. Basically the plugin will no longer work with a business without a physical address. Here is the response from Google:
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Hi,
Thank you for the update and information provided.
Upon further inspection, I can now confirm that your busines is registered as a Service Area Business (SAB), i.e. a business who visits, serves or delivers services to local customers.
Note that the Places API functionality is to enable developers to help users find relevant places to visit. Since Service Area Businesses are not places users can visit (as opposed to a walk-in business), they do not belong in the Places API. That is the reason why you cannot search it in Places API and it is an intended behavior.
You can fix this via Google My Business only if you have a brick-and-mortar shop
(a shop customers can walk in to visit)
Best Regards,
Tomás S.-
The Google Maps Platform Team (EMEA)