It appears the command Get-EntitlementsSchema is trying to call a v3 endpoint /sources/:id/schemas/entitlements, which I do not believe exists. I have tried this both in PowerShell and Postman and gotten the same 400 response
Get-EntitlementSchema is meant to download a schema template and only to be used for delimited file sources. What I needed to be using was Get-SourceSchemas
It appears the command Get-EntitlementsSchema is trying to call a v3 endpoint /sources/:id/schemas/entitlements, which I do not believe exists. I have tried this both in PowerShell and Postman and gotten the same 400 response