Certificate and private key do not match

Im not understanding something
Is this talking about the lestencrypt cert or SSH
key = “/etc/prosody/certs/xxxxxxxx.key”;
certificate = “/etc/prosody/xxxxxxxx.crt”;

letsencrypt only has pem
Im getting the following error
[Mon Jan 11 17:38:22.324374 2021] [ssl:emerg] [pid 28033] AH02565: Certificate and private key xxxxxxxx:443:0 from /etc/letsencrypt/live/www.xxxxxxxxxx.net/fullchain.pem and /root/.ssh/xxxxxxxHomeRoot do not match
AH00016: Configuration Failed