Google Domain Verification with DNS Server

I want to verificate my domain with google but i have a problem, look at this:

I need to set a TXT Record with a value but when im going to do it

when i do it in the DNS Server give me this error:

Please check if the host name format is correct.
.

neither this one:

Name should be @ or your root domain name.
And copy full record value to Record value field.