Please consider updating Certbot to Certbot 4.0.0 released.
Also there are some DNSSEC Errors here studenka-headquarters.run.place | DNSViz
Here too Hardenize Report: studenka-headquarters.run.place observe all the SERVFAIL
the same error that Let's Debug see here https://letsdebug.net/studenka-headquarters.run.place/2428126