Res_rtp_asterisk.c:2120 ast_rtp_dtls_set_configuration: Specified certificate for RTP instance '0x7f2274066b20' could not be used

I’m using asterisk 16

sip.conf
;!
;! Automatically generated configuration file
;! Filename: /etc/asterisk/sip.conf
;! Generator: Manager
;! Creation Date: Wed Oct 7 13:14:27 2020
;!
[8006]
type = friend
username = 8006
secret = AEsip1978
context = from-internal
callerid = <8006>
disallow = all
allow = ulaw
nat = force_rport,comedia
host = dynamic
qualify = yes
encryption = yes
avpf = yes
force_avp = yes
icesupport = yes
directmedia = yes
dtlsenable = yes
dtlsverify = fingerprint
dtlscertfile = /etc/asterisk/keys/asterisk.pem
dtlscafile = /etc/asterisk/keys/ca.crt
dtlssetup = actpass
[8005]
type = friend
username = 8005
secret = AEsip1978
context = from-internal
callerid = <8005>
disallow = all
allow = ulaw
nat = force_rport,comedia
host = dynamic
qualify = yes
encryption = yes
avpf = yes
force_avp = yes
icesupport = yes
directmedia = yes
dtlsenable = yes
dtlsverify = fingerprint
dtlscertfile = /etc/asterisk/keys/asterisk.pem
dtlscafile = /etc/asterisk/keys/ca.crt
dtlssetup = actpass
[8002]
type = friend
username = 8002
secret = AEsip1978
context = from-internal
callerid = <8002>
disallow = all
allow = ulaw
nat = force_rport,comedia
host = dynamic
qualify = yes
encryption = yes
avpf = yes
force_avp = yes
icesupport = yes
directmedia = yes
dtlsenable = yes
dtlsverify = fingerprint
dtlscertfile = /etc/asterisk/keys/asterisk.pem
dtlscafile = /etc/asterisk/keys/ca.crt
dtlssetup = actpass
[8000]
type = friend
username = 8000
secret = AEsip1978
context = from-internal
callerid = <8000>
disallow = all
allow = ulaw
nat = force_rport,comedia
host = dynamic
qualify = yes
encryption = yes
avpf = yes
force_avp = yes
icesupport = yes
directmedia = yes
dtlsenable = yes
dtlsverify = fingerprint
dtlscertfile = /etc/asterisk/keys/asterisk.pem
dtlscafile = /etc/asterisk/keys/ca.crt
dtlssetup = actpass
[8001]
type = friend
username = 8001
secret = AEsip1978
context = from-internal
callerid = <8001>
disallow = all
allow = ulaw
nat = force_rport,comedia
host = dynamic
qualify = yes
encryption = yes
avpf = yes
force_avp = yes
icesupport = yes
directmedia = yes
dtlsenable = yes
dtlsverify = fingerprint
dtlscertfile = /etc/asterisk/keys/asterisk.pem
dtlscafile = /etc/asterisk/keys/ca.crt
dtlssetup = actpass
[8090]
type = friend
username = 8090
secret = 8090
context = from-internal
callerid = <8090>
disallow = all
allow = ulaw
nat = force_rport,comedia
host = dynamic
qualify = yes
encryption = yes
avpf = yes
force_avp = yes
icesupport = yes
directmedia = yes
dtlsenable = yes
dtlsverify = fingerprint
dtlscertfile = /etc/asterisk/keys/asterisk.pem
dtlscafile = /etc/asterisk/keys/ca.crt
dtlssetup = actpass
[general]
context = from-sip
disallow = all
allow = gsm
allow = ulaw
realm = 127.0.0.1
udpbindaddr = 0.0.0.0:5060
tcpenable = no
tcpbindaddr = 0.0.0.0
transport = udp,ws,wss
srvlookup = yes
rtptimeout = 60
#include “device-sip.conf”

device-sip.conf

;!
;! Automatically generated configuration file
;! Filename: /etc/asterisk/device-sip.conf
;! Generator: Manager
;! Creation Date: Wed Oct 7 13:14:30 2020
;!
[7778]
type = friend
username = 7778
secret = AEsip1978
context = from-internal
callerid = <7778>
disallow = all
allow = ulaw
nat = force_rport,comedia
host = dynamic
directrtpsetup = yes
icesupport = no

Error:-
[Oct 7 13:18:16] ERROR[716175][C-00000002]: res_rtp_asterisk.c:2120 ast_rtp_dtls_set_configuration: Specified certificate for RTP instance ‘0x7f2274066b20’ could not be used
[Oct 7 13:18:16] ERROR[716175][C-00000002]: chan_sip.c:6023 dialog_initialize_dtls_srtp: Attempted to set an invalid DTLS-SRTP configuration on RTP instance ‘0x7f2274066b20’
[Oct 7 13:18:16] NOTICE[716175][C-00000002]: chan_sip.c:19680 send_check_user_failure_response: RTP init failure for device "superadmin"sip:8090@127.0.0.1;tag=XaCt1T0HwuzP6l3qXSxC for INVITE, code = -9

@jcolp please help here

Please don’t tag myself or other individuals. If anyone wishes to participate or respond, then they will do so.

can anyone help here ?