ConvertPlus comes along with an inbuilt lead capture tool, called Connects. Connects helps you store and manage leads within itself, or integrate with third party mailers.
After a successful submission, the email id gets stored immediately, but, it is found that the additional fields, like the name or a similar one show N/A.
I have a modal popup that asks a user to enter his Name and email address. Something like the one shown below.
In case you are using Connects to store and manage leads internally, you will have to check the field name you entered in the Form builder for the specific module.
In case you have already integrated ConvertPlus with a third party mailer, you will have to follow the field name format they use. For more information about synchronizing fields, you can refer to the documents.