Email-marketing with mistakes (DNS_PROBE_FINISHED_NXDOMAIN)

After delegation to CloudFlare servers, links from letters stopped opening (mailings are carried out through the service)

When trying to follow the link from the letter - an error DNS_PROBE_FINISHED_NXDOMAIN.

What do we need to do to restore mailings?
Example of a link from an email:,=0jB3ac0OG3gvAUE7Un5jhBw/72,31590,1,?aHR0cHM6Ly9idXNpbmVzc29sb2cucnUvbmV3cy00NDkwLW1hcmtpcm92a2EvP3V0bV9tZWRpdW09bGV0dGVyJnV0bV9zb3VyY2U9bGV0dGVyX2FydGljbGVzJnV0bV9jYW1wYWlnbj1sZXR0ZXJfbmV3c18yMDIxXzA3XzA1

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