fix: observer

src/lib/components/billing/paymentBoxes.svelte

@@ -29,13 +29,15 @@
                 }
             }
         });
-
-        observer.observe(element, { childList: true });
     });
 
     onDestroy(() => {
         observer.disconnect();
     });
+
+    $: if (element) {
+        observer.observe(element, { childList: true });
+    }
 </script>
 
 <RadioBoxes elements={methods} total={methods?.length} variableName="$id" name="payment" bind:group>

src/routes/console/account/payments/paymentModal.svelte

@@ -55,14 +55,16 @@
                 }
             }
         });
-
-        observer.observe(element, { childList: true });
     });
 
     onDestroy(() => {
         observer.disconnect();
         document.documentElement.classList.remove('u-overflow-hidden');
     });
+
+    $: if (element) {
+        observer.observe(element, { childList: true });
+    }
 </script>
 
 <FakeModal bind:show title="Add payment method" bind:error onSubmit={handleSubmit}>