Cannot get developer license for Windows RT 8.1 [0xC03F1014]

Hi,

When trying to obtain a developer license on my Surface Running Windows RT 8.1 (version 6.3 build 9600), I'm getting the following error:

We couldn't get your developer license for Windows RT 8.1

Error 0xC03F1014.

I read that the issue could be related to Windows activation, but Windows is activated on both the tablet and the developer machine.

Any ideas?

Thanks in advance,

Mauricio