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

[squebel]

Well, Support did come back with an answer and it looks like it is because we have restore points from Proxmox in the mix causing the issues and apparently that platform is not supported at all (yet. ever?) in the VEM api. Frustrating.