diff --git a/packages/Webkul/Paypal/src/Resources/views/checkout/onepage/paypal-smart-button.blade.php b/packages/Webkul/Paypal/src/Resources/views/checkout/onepage/paypal-smart-button.blade.php
index a409b6ae0..233ada657 100644
--- a/packages/Webkul/Paypal/src/Resources/views/checkout/onepage/paypal-smart-button.blade.php
+++ b/packages/Webkul/Paypal/src/Resources/views/checkout/onepage/paypal-smart-button.blade.php
@@ -8,59 +8,63 @@
 </style>
 
 <script>
-    window.onload = (function() {
-        eventBus.$on('after-payment-method-selected', function(payment) {
-            if (payment.method != 'paypal_smart_button') {
-                $('.paypal-buttons').remove();
+    if (typeof paypal == 'undefined') {
+        window.flashMessages = [{'type': 'alert-error', 'message': "SDK Validation error: 'client-id not recognized for either production or sandbox: {{core()->getConfigData('sales.paymentmethods.paypal_smart_button.client_id')}}'" }];
+    } else {
+        window.onload = (function() {
+            eventBus.$on('after-payment-method-selected', function(payment) {
+                if (payment.method != 'paypal_smart_button') {
+                    $('.paypal-buttons').remove();
 
-                return;
-            }
-
-            var options = {
-                style: {
-                    layout:  'vertical',
-                    shape:   'rect',
-                },
-
-                enableStandardCardFields: false,
-
-                createOrder: function(data, actions) {
-                    return window.axios.get("{{ route('paypal.smart_button.details') }}")
-                        .then(function(response) {
-                            return actions.order.create(response.data);
-                        })
-                        .catch(function (error) {})
-                },
-
-                // Finalize the transaction
-                onApprove: function(data, actions) {
-                    app.showLoader();
-
-                    return actions.order.capture().then(function(details) {
-                        return window.axios.post("{{ route('paypal.smart_button.save_order') }}", {
-                                '_token': "{{ csrf_token() }}",
-                                'data' : details
-                            })
-                            .then(function(response) {
-                                if (response.data.success) {
-                                    if (response.data.redirect_url) {
-                                        window.location.href = response.data.redirect_url;
-                                    } else {
-                                        window.location.href = "{{ route('shop.checkout.success') }}";
-                                    }
-                                }
-
-                                app.hideLoader()
-                            })
-                            .catch(function (error) {
-                                window.location.href = "{{ route('shop.checkout.cart.index') }}";
-                            })
-                    });
+                    return;
                 }
-            };
 
-            paypal.Buttons(options).render(".paypal-button-container");
+                var options = {
+                    style: {
+                        layout:  'vertical',
+                        shape:   'rect',
+                    },
+
+                    enableStandardCardFields: false,
+
+                    createOrder: function(data, actions) {
+                        return window.axios.get("{{ route('paypal.smart_button.details') }}")
+                            .then(function(response) {
+                                return actions.order.create(response.data);
+                            })
+                            .catch(function (error) {})
+                    },
+
+                    // Finalize the transaction
+                    onApprove: function(data, actions) {
+                        app.showLoader();
+
+                        return actions.order.capture().then(function(details) {
+                            return window.axios.post("{{ route('paypal.smart_button.save_order') }}", {
+                                    '_token': "{{ csrf_token() }}",
+                                    'data' : details
+                                })
+                                .then(function(response) {
+                                    if (response.data.success) {
+                                        if (response.data.redirect_url) {
+                                            window.location.href = response.data.redirect_url;
+                                        } else {
+                                            window.location.href = "{{ route('shop.checkout.success') }}";
+                                        }
+                                    }
+
+                                    app.hideLoader()
+                                })
+                                .catch(function (error) {
+                                    window.location.href = "{{ route('shop.checkout.cart.index') }}";
+                                })
+                        });
+                    }
+                };
+
+                paypal.Buttons(options).render(".paypal-button-container");
+            });
         });
-    });
+    }
 </script>
 @endif
\ No newline at end of file