My Let's Encrypt certificate expired on Aug 25 and won't renew

Site: desfilming.com (custom domain, also project name)

My Let’s Encrypt certificate expired on Aug 25 and won’t renew. Error shown in HTTPS panel:

SniCertificate::CertificateValidationError: Unable to verify challenge for *.desfilming.com:
DNS problem: NXDOMAIN looking up TXT for _acme-challenge.desfilming.com - check that a DNS
record exists for this domain

DNS is managed externally at Hostinger (not Netlify DNS), since email is hosted there. I
don’t need a wildcard certificate — just the apex domain and its www subdomain.

Could you please remove the stale wildcard certificate and reprovision a standard Let’s
Encrypt certificate for this domain and its www subdomain?

Thanks!