RTO India — Unable to book slot for learning licence test

Address: North 24 parganas district, west bengal

As shown in attached photo, I cant enter the application number while trying to book my learning licence test appointment because the application number text is disabled. The box is supposed to be enabled when I select the service portal through which I am booking the appointment. However, there are no options of service portal to choose from on the website as also shown in the image. I think its a problem with the site design and hope it gets rectified asap. Hope to get help soon on this matter.