we have server that has certbot and generates certificates (manually) for first.ourdomain and second.ourdomain.
In a half of the year, something was wrong with this server. Also In this time certificates were not renewed. We recovered this server from backup from January and then problems with generating certifcates begun.
Every try ends with:
The key authorization file from the server did not match this challenge
Challenge method is http-01.
There was no changes in system settings, FW, DNS or certbot settings…