diff --git a/cli/commands/profile.py b/cli/commands/profile.py
index 1556d12..4f7902a 100644
--- a/cli/commands/profile.py
+++ b/cli/commands/profile.py
@@ -11,6 +11,7 @@ from core.models.system.SystemConnection import SystemConnection
 from core.models.system.SystemProfile import SystemProfile
 from cli.helpers import sanitize_profile, parse_application_argument, parse_location_argument
 from cli.observers import profile_observer, application_version_observer, connection_observer, invoice_observer
+from core.Errors import SingboxNotInstalledException
 import pprint
 
 NAME = 'profile'
@@ -112,6 +113,8 @@ def handle(arguments, main_parser):
             main_parser.error('the following argument should be a valid reference: --id/-i')
         try:
             ProfileController.enable(profile, ignore=ignore, pristine=arguments.pristine, asynchronous=True, profile_observer=profile_observer, application_version_observer=application_version_observer, connection_observer=connection_observer)
+        except SingboxNotInstalledException as exception:
+            main_parser.error('sing-box is not installed. Please run the installation script first.')
         except (InvalidSubscriptionError, MissingSubscriptionError) as exception:
             _handle_subscription_error(exception, profile, ignore, arguments, main_parser)
 
@@ -175,7 +178,7 @@ def _handle_subscription_error(exception, profile, ignore, arguments, main_parse
             pass
         else:
             print('\nInput appears to be invalid. Please try again.\n')
-            
+
 def _build_ignore(arguments):
     ignore = []
     if getattr(arguments, 'without_connection_protection', False):