How do I add email addresses to assign a form?

I have written a message to send with the form.  I have copied and pasted email addresses - separated by a comma and one space.

I have even tried to upload a cvs file.  

The form will not let me click on "assign form." That button is not available.

You can only add one email address at a time in the box. For multiple emails, the CSV upload is the best option.

When you upload, you have to wait for the page to upload the list of email addresses. It will do it in the background - no indication of the progress except it won't allow you to click the buttons and anything on the page.

I tried with CSV of 100 emails, and it took some time to clear it up and enable the Send Invitation button, see below:

If you have a list lower than this, then maybe check the CSV formatting of the emails. It should be comma separated. 

Thank you! I have more than 100 addresses, so thats the problem. I will learn to be patient.
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I hope there would no issue in uploading the CSV. If you face any difficulty kindly let us know we would be more than happy to assist you.

Regards.