gridserver.io has no TXT records.
Question and response
Question
dig redirector.gridscale.io. TXT
Answer
The response has no answer records.
Authority
gridscale.io. 3600 SOA ns1.dnsimple.com. admin.dnsimple.com. 1582807943 86400 7200 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0