Enterprise Manage API endpoint - Unsupported object platform

[squebel]

Case: 07980093
Running a GET against this endpoint results in a status code 500 that you see below:
https://enterprisemgr:9398/api/vmRestor ... mat=Entity

Invoke-RestMethod:
<Error
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
Message="Unsupported object platform &quot;CustomPlatform&quot;"
StatusCode="500"
Status="InternalServerError"
xmlns="http://www.veeam.com/ent/v1.0" />

I have been able to track this restore point back to an incremental that exists on a S3-compliant platform. We are seeing this on a lot of restore points where they exist on S3. This is some kind of new behavior that has started as we have been able to get this data for a long time now and did not change our code that pulls this data. It's like something in Veeam API is broken.

Enterprise Manager and VBR is running 12.3.2