Can't properly save dialplan using Asterisk 13.1.0

Asterisk doesn’t seem to save my extensions correctly in extensions.conf

Using the CLI, if I do:

[code] CLI> dialplan add extension 135,1,Dial,SIP/135 into LocalSets
Extension ‘135,1,Dial(SIP/135)’ added into ‘LocalSets’ context
– Added extension ‘135’ priority 1 to LocalSets

CLI> dialplan show
[ Context ‘LocalSets’ created by ‘pbx_config’ ]
‘135’ => 1. Dial(SIP/135) [pbx_config]

CLI>dialplan save
Dialplan successfully saved into ‘/etc/asterisk/extensions.conf’
== Parsing ‘/etc/asterisk/extensions.conf’: Found[/code]

My extensions.conf file

[code][general]
static=yes
writeprotect=no
autofallthrough=yes
clearglobalvars=no
extenpatternmatchnew=no

[LocalSets]
exten => 135,1,Dial()[/code]

Am I doing something wrong? It was working when I was using Asterisk 13.0. Any help would be appreciated. Thanks.