Can't log in - Need Community Admin to invite me

Printify sent me a message offering me a Core Tier Member Scholarship: Congratulations! You're eligible to join Printify's first Etsy mentorship program on a FULL scholarship.

When I follow the links I get the attached error message, apparently I need an community admin to invite me then I can follow my links again. Hopefully, an admin out there understands this message, cause I’m confused.

Appreciate any help.