Let's encrypt plugin dos not work anymore with OVH

I used successfully let’s encrypt since month to renew SSL certificate and for 2 month now, it returns error:

Error adding TXT record: Expecting value: line 1 column 1 (char 0)
Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details.

I cannot find the log file specified and I have tried a lot of things (upgrading everything and loosing my ssd card and restore backups) so now I ask for help as the error message adviced me :slight_smile: