Sage 300 erp webapi get error

hi

I m trying to call sage 300 erp webapi - arcustomer, but I m getting dblinkerror

 I m just trying to make a call using swagger 

10.10.0.12/.../ARCustomers using proper credentials 

but I get the error below, upon a couple of web readings and blog posts, this error comes using SDK on the third-party app, but this prod, my sage is working fine, just when I call the API via swagger I get this error, I check the app pool settings even hosting a test API to check if all is working fine.

since swagger can list all sage API endpoints I m not sure what could be the issue, please assist

stacktrace registered the following error 

(Inner Exception)
Exception Source: ACCPAC.Advantage.COMSVR.Interop
Exception Type: System.Runtime.InteropServices.COMException
Exception Message: Error HRESULT E_FAIL has been returned from a call to a COM component.
---- Stack Trace ----
AccpacCOMSVR.AccpacSvrDBLinkClass.ExOpenViewInstance(String ViewID, AccpacSvrView& ppView, Int32 OpenModes, Int32 OpenDirectives, Object OpenExtra, AccpacSvrProcessServerSetup ProcessServer) in ACCPAC.Advantage.COMSVR.Interop.dll
ACCPAC.Advantage.Server.DBLink.OpenView(String viewID, ViewOpenModes openModes, Int32 prefetch, ViewOpenDirectives openDirectives, Object openExtra, ProcessServerSetup processServerSetup, ViewInfo& viewInfo) in ACCPAC.Advantage.Server.dll

swagger API response 

erorr is:

{

  "error": {

    "code": "DBLinkError",

    "message": {

      "lang": "en-US",

      "value": "Unable to access the requested application due to an installation or configuration problem."

    }

  }

}