I sent my TPS application when it was extended. This is my first time applying, not re-registration. I got a rejection letter saying ".....must file a complete application within designated registration period. The registration period under which you filed your application ended. .."

Has anyone been in similar situation? Isn't the re-registration period for first-time applicants too? I have H1B which expires August, 2017 (green card not possible through employer) so was thinking TPS will help me work at least until June 2018.