WebSocket\ConnectionException Could not open socket to "127.0.0.1:7999": Connection refused (111).

Error when creating CHAN_SIP extension and linking to a user imported via LDAP

WebSocket\ConnectionException thrown with message "Could not open socket to "127.0.0.1:7999": Connection refused (111)."

Stacktrace:
#14 WebSocket\ConnectionException in /var/www/html/admin/modules/zulu/vendor/textalk/websocket/lib/Client.php:95
#13 WebSocket\Client:connect in /var/www/html/admin/modules/zulu/vendor/textalk/websocket/lib/Base.php:48
#12 WebSocket\Base:send in /var/www/html/admin/modules/zulu/Zulu.class.php:3024
#11 FreePBX\modules\Zulu:connectCommandServer in /var/www/html/admin/modules/zulu/Zulu.class.php:3035
#10 FreePBX\modules\Zulu:getBackendClient in /var/www/html/admin/modules/zulu/Zulu.class.php:3039
#9 FreePBX\modules\Zulu:sendBackendMessage in /var/www/html/admin/modules/zulu/Zulu.class.php:3058
#8 FreePBX\modules\Zulu:sendEventToClientsByUserID in /var/www/html/admin/modules/zulu/Zulu.class.php:2357
#7 FreePBX\modules\Zulu:usermanUpdateGroup in /var/www/html/admin/libraries/BMO/Hooks.class.php:189
#6 call_user_func_array in /var/www/html/admin/libraries/BMO/Hooks.class.php:189
#5 FreePBX\Hooks:processHooksByClassMethod in /var/www/html/admin/modules/userman/functions.inc/auth/Auth.php:49
#4 FreePBX\modules\Userman\Auth\Auth:updateGroupHook in /var/www/html/admin/modules/userman/functions.inc/auth/modules/Msad2.php:447
#3 FreePBX\modules\Userman\Auth\Msad2:updateGroup in /var/www/html/admin/modules/userman/Userman.class.php:1915
#2 FreePBX\modules\Userman:updateGroup in /var/www/html/admin/modules/userman/functions.inc/guihooks.php:356
#1 userman_configprocess in /var/www/html/admin/libraries/components.class.php:469
#0 component:processconfigpage in /var/www/html/admin/config.php:422