as your dialplan only accepts digits starting with 961.
and you are dialling 91267938307 which is not matching the dial pattern.
"6" missing
if it is country code then add in your leads.
or use the below dialplan to add 6 automatically while dialling out
exten => _91X.,1,AGI(
agi://127.0.0.1:4577/call_log)
exten => _91X.,2,Dial(SIP/
6${EXTEN:1}@goautodial,,tTo)
exten => _91X.,3,Hangup