Warning received when accessing Sandbox R/3 system via NWBC

Hi,

I'm currently involved in a NWBC PoC pilot, where we are looking to setup a number of connections/trust relationships from a primary SAP system to other SAP systems via NWBC. We are working NWBC 4.0 PL9.

However when I try and login to our R/3 Sandbox system via NWBC, I receive the following warning message:

After clicking OK, I'm able to access NWBC but I do not see my User (Role) Menu (Work Centres) from the initial Index screen.

After a while I receive another warning message:

Anyone have an idea what is causing this and how it can be resolved?

Thanks