Hello there and thanks for your interest!
I'm sorry, but gmail is rejecting our account setup requests, and thus I can't complete the account setup with a gmail e-mail address.
We have a couple options of how I can help you get setup.
1) You can try an alternative e-mail address that you have (if any)
2) You can setup a protonmail e-mail which should be free and quick to setup, and we know works with our system:
https://proton.me/mail
3) You can join our Discord and connect with me and I'll help get you a password to get things going:
https://discord.gg/AHTfxQV
Please let me know if that will work or if you have any questions, and I'm very sorry for the inconvenience.