Cannot Update CNAME and TXT records for Constant Contact

We need to add two CNAME records and one TXT record on our domain to verify our domain can be used to send e-mails via Constant.  However, Homestead will not allow me to make the changes.

I copied and pasted the record names and values and the following is the error message that Homestead shows me whenever I try to submit the updates.

"It appears that our partners are experiencing some technical difficulties, so we were unable to submit your A Record, CNAME, MX and TXT Record changes at this time. Please ensure that the records you are attempting to submit are valid and try again later.

Please enter a valid host name, which can either be an alpha-numeric string (like "abc123"), or * for your CNAME Records."