Not able join windows insider program

[tyagitanmay2007gamil]

Good Afternoon Sir/Mam 

I am Tanmay actually i am not able join to windows insider program when i am ragister there some error number 0x800BFA07 please resolve fast 

[#2]

Hi,
You've posted your topic in "Cortana" community,
You can click/tap on Community Hub (shown at the top of every page) -> Browse All Community Hubs to view the full list of all product related Hubs.

Windows insider community hub:
https://techcommunity.microsoft.com/t5/windows-insider-program/bd-p/WindowsInsiderProgram

Which version of Windows 10 are you using currently?
are you signed in with your Microsoft account in Windows 10?