I added three wild card sub domain to same server IP and try to add the SSL. It worked for few hours but after that it again stopped and giving a connection error. So please help me

Also If i tried the third option of wildcard certificate option then I am getting issue in TXT value of domain. I am adding the TXT value as instructed but it is not working. It is not fetching the TXT value from domain and saying it is wrong.
URL - Getting wildcard certificates with Certbot
I ran this command - ./certbot-auto certonly --manual -d *.mytaxlogin.com -d mytaxlogin.com --preferred-challenges dns-01 --server https://acme-v02.api.letsencrypt.org/directory
It runs fine but at end it is not accepting TXT value I am adding in domain account.