diff --git a/code/backend/nest_backend/__main__.py b/code/backend/nest_backend/__main__.py
index 86633e9..e8e181b 100644
--- a/code/backend/nest_backend/__main__.py
+++ b/code/backend/nest_backend/__main__.py
@@ -16,7 +16,6 @@ jwt = JWTManager(app)
 cors = CORS(app)
 app.config['CORS_HEADERS'] = 'Content-Type'
 
-
 reverse_proxy_app = werkzeug.middleware.proxy_fix.ProxyFix(app=app, x_for=1, x_proto=0, x_host=1, x_port=0, x_prefix=0)
 # Routes setup
 
@@ -29,11 +28,14 @@ app.add_url_rule("/api/repository/create", view_func=page_repository_create, met
 app.add_url_rule("/api/repository/edit", view_func=page_repository_edit, methods=["PUT"])
 app.add_url_rule("/api/repository/add_condition", view_func=page_repository_add_condition, methods=["POST"])
 
+app.register_error_handler(Exception, error_handler)
+
 if __name__ == "__main__":
     with app.app_context():
         Base.create_all(app=app)
         if not User.query.filter_by(isAdmin=True).all():
-            Base.session.add(User(email="admin@admin.com", password=gen_password("password"), username="admin", isAdmin=True))
+            Base.session.add(
+                User(email="admin@admin.com", password=gen_password("password"), username="admin", isAdmin=True))
             Base.session.commit()
         debug = True
         if os.getenv("DISABLE_DEBUG"):
diff --git a/code/backend/nest_backend/gestione.py b/code/backend/nest_backend/gestione.py
index 22c8a66..f998d42 100644
--- a/code/backend/nest_backend/gestione.py
+++ b/code/backend/nest_backend/gestione.py
@@ -96,3 +96,8 @@ def json_success(data):
     :return: a json formatted string
     """
     return jsonify({"result": "success", "data": data})
+
+
+def error_handler(e):
+    print(f"{e.description} - {e.code}")
+    return json_error(f"{e.description} - {e.code}")
diff --git a/code/backend/nest_backend/routes/users/user_create.py b/code/backend/nest_backend/routes/users/user_create.py
index 43fb5a1..1f36faf 100644
--- a/code/backend/nest_backend/routes/users/user_create.py
+++ b/code/backend/nest_backend/routes/users/user_create.py
@@ -18,7 +18,7 @@ def page_user_create():
     """
     user = find_user(get_jwt_identity())
     if not user.isAdmin:
-        abort(403)
+        json_error("User is not admin. Thou art not authorized."), 403
     new_user = User(email=request.json.get("email"), password=gen_password(request.json.get("password")),
                     username=request.json.get("username"))
     Base.session.add(new_user)