Try catch the request

src/routes/api/newsletter/+server.ts

@@ -26,16 +26,23 @@ export const POST = (async ({ request, fetch }) => {
             email_address: email,
         })
     })
-    const res = await req.json()
-    console.log('server API response:', res)
 
-    // Other error
-    if (res && res.status !== 'PENDING') {
-        return json({ message: res.error.code })
+    try {
+        if (req.ok) {
+            const res = await req.json()
+            console.log('server API response:', res)
+
+            // Other error
+            if (res && res.status !== 'PENDING') {
+                return json({ message: res.error.code })
+            }
+
+            return json({
+                success: true,
+                message: res.status,
+            })
+        }
+    } catch (err) {
+        console.error(err)
     }
-
-    return json({
-        success: true,
-        message: res.status,
-    })
 }) satisfies RequestHandler