SSL from

My website is running perfectly fine until today for some reason, SSL 30 days free from LetsEncrypt changed to Self-signed that will expire in 3649 days.
Because of this event, our chatbot created on Facebook app gets a warning that it no longer can send data to our webhooks.
Below are some messages that I can find on our log files.
and some screenshots (Untitled — ImgBB)
[03.19.2020_05-31-02] Trying to obtain SSL for: and:
[03.19.2020_05-31-02] /root/ --issue -d -d --cert-file /etc/letsencrypt/live/ --key-file /etc/letsencrypt/live/ --fullchain-file /etc/letsencrypt/live/ -w /home/ --force
[03.19.2020_05-31-15] Failed to obtain SSL for: and:
[03.19.2020_05-31-15] Trying to obtain SSL for:
[03.19.2020_05-31-18] Failed to obtain SSL, issuing self-signed SSL for:
[03.19.2020_05-31-18] Self signed SSL issued for

Hey there. I have the same issue. But I think, it’s caused by the rate limit of let’s encrypt.
See this one: Rate Limits - Let's Encrypt

You can see the error from the terminal, try this (change with your own domain):
/root/ --issue -d -d --cert-file /etc/letsencrypt/live/ --key-file /etc/letsencrypt/live/ --fullchain-file /etc/letsencrypt/live/ -w /home/ --force