/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])

[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