Can not connect to HANA from AO 2.1

I have ran into a bit of a kerfuffle.

I have tried to upgrade my AO to version 2.1.1.10239 since our HANA was upgraded to 1.00.097.01.1436865239 to use the new connection method to connect to HANA.

It did also work before, but I had to downgrade again to 1.4 SP13, since I was not able to save the workbooks (it insisted that I was trying so save in format 1.4x and that doesn't support the new connections).

But since it worked for others I updated again, but now I get this error, when I try to open the window, where you manage the new HANA http connections, but instead of getting the window I get this:

Any idea what's causing this?

Regards

/Thomas