[SR-Users] Cannot start kamailio with TLS

Hi Guys, After enabling TLS i am getting following error in Kamailio 5.1 /usr/sbin/kamailio[2214]: ERROR: tls [tls_util.h:42]: tls_err_ret(): load_cert:error:20074002:BIO routines:file_ctrl:system lib /usr/sbin/kamailio[2214]: ERROR: tls [tls_util.h:42]: tls_err_ret(): load_cert:error:140DC002:SSL routines:use_certificate_chain_file:system lib /usr/sbin/kamailio[2214]: ERROR: <core> [core/sr_module.c:940]: init_mod_child(): error while initializing module tls (/usr/lib/x86_64-linux-gnu/kamailio/modules/tls.so) (idx: 0 rank: -127 desc: [main]) My tls.conf is as follows: [server:default] method = TLSv1+ verify_certificate = no require_certificate = no private_key = /etc/kamailio/keys/my.key.pem certificate = /etc/kamailio/keys/my.crt.pem #ca_list = /etc/kamailio/tls/cacert.pem #crl = /etc/kamailio/tls/crl.pem # This is the default client domain, settings # in this domain will be used for all outgoing # TLS connections that do not match any other # client domain in this configuration file. # We require that servers present valid certificate. # [client:default] #method = TLSv1 verify_certificate = yes require_certificate = yes Please hep me to understand and fix the issue.