SSL certification Expires | Help needed

Dear Jitsi Team,
SSL certificate is expired.
letsencrypt SSL certificate was set to be expired on 16th Dec, 2019. So before expiry date i ran certbot-auto renew command and then checked with the below commands

openssl x509 -dates -noout < /etc/letsencrypt/live/video.multinet.com.pk/cert.pem
openssl x509 -dates -noout < /etc/letsencrypt/live/vc.multinet.com.pk/cert.pem
openssl x509 -dates -noout < /etc/letsencrypt/live/vc.multinet.com.pk/chain.pem
openssl x509 -dates -noout < /etc/letsencrypt/live/vc.multinet.com.pk/fullchain.pem
openssl x509 -dates -noout < /etc/letsencrypt/live/vc.multinet.com.pk/privkey.pem

Output of above commands is mentioned below.

=================================================================================================================================
root@videocon:~# openssl x509 -dates -noout < /etc/letsencrypt/live/vc.multinet.com.pk/cert.pem
notBefore=Dec 12 18:27:26 2019 GMT
notAfter=Mar 11 18:27:26 2020 GMT

root@videocon:~# openssl x509 -dates -noout < /etc/letsencrypt/live/vc.multinet.com.pk/chain.pem
notBefore=Mar 17 16:40:46 2016 GMT
notAfter=Mar 17 16:40:46 2021 GMT

root@videocon:~# openssl x509 -dates -noout < /etc/letsencrypt/live/vc.multinet.com.pk/fullchain.pem
notBefore=Dec 12 18:27:26 2019 GMT
notAfter=Mar 11 18:27:26 2020 GMT

root@videocon:~# openssl x509 -dates -noout < /etc/letsencrypt/live/vc.multinet.com.pk/privkey.pem
unable to load certificate
139838808695232:error:0909006C:PEM routines:get_name:no start line:…/crypto/pem/pem_lib.c:745:Expecting: TRUSTED CERTIFICATE

I have again ran the below command and output is also mentioned.

root@videocon:~# /usr/local/sbin/certbot-auto renew
Saving debug log to /var/log/letsencrypt/letsencrypt.log


Processing /etc/letsencrypt/renewal/vc.multinet.com.pk.conf


Cert not yet due for renewal


The following certs are not due for renewal yet:
/etc/letsencrypt/live/vc.multinet.com.pk/fullchain.pem expires on 2020-03-11 (skipped)
No renewals were attempted.


Now situation is that SSL is expired and my web application is not able to connect with JITSI.
Can you please help me out how to resolve SSL certificate issue.