If you can't finish signing the ICA, make sure you completed all of the required fields. Here is one area where people can get stuck:
If you are naming one Sponsor, make sure you select the first option (Yes, I would like to name a Sponsoring Agent) and fill out the Sponsoring Agent Name and Email on the first line.
If you want to name two sponsors, make sure to select the second option (Yes, I would like to name two (2) Sponsoring Agents), Make sure you fill out the Sponsoring Agent Name and Email on the second and third line.