Unable to add vMax to Solutions Integration Service

Hi,

Running VSI for vmware webclient 6.2.

smi-s setup connected via GK devices.

Tested the setup with Storage intergrator for microsoft.

I'm unable to add the vmax systems to VSI. The error is :

Failed to create a new storage system. Details: Validation Error: For input string: "null"

In the logs there are no errors. When I click ok the systems is added, but refreshing the pools gives error :

Failed to synchronize storage pools. Details: For input string: "null"

I've searched support, but no mention of the error.