Gst registration for sez developer

Under one Company's name we are developing Residential project as well as SEZ project.

We have already registered Residential project under GST and received provisional Registration No.also.

As per GST Rule Sez project we have to have separate registation .

Now we are trying to do another registration for SEZ, but  we are unable do any registration online now.

Please advise how to do another registeration for SEZ Project.

Regards,

AVS Menon