# Web Preview (works) Vs App Preview (errors out) with Onesignal **URL:** \ **Category:** Issues / Bugs\ **Created:** [April 27, 2024, 11:11am UTC](https://community.thunkable.com/t/web-preview-works-vs-app-preview-errors-out-with-onesignal/2971980 "2024-04-27T11:11:24Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![superqueing5v53](https://avatars.discourse-cdn.com/v4/letter/s/fbc32d/32.png) [@superqueing5v53](https://community.thunkable.com/u/superqueing5v53)\ **Post date:** [April 27, 2024, 11:11am UTC](https://community.thunkable.com/t/web-preview-works-vs-app-preview-errors-out-with-onesignal/2971980/1 "2024-04-27T11:11:24Z")
I am creating a application that sends messages from devices to devices with one signal i have 4 phone in my test Fleet all of them work like a charm at receiving the onesignal push notifications but when i try and trigger a push send from any of the phones using the companion app they don’t wont and i am given a error (so just to sum up if i preview with browser it works if i preview with app i can t send push any more this is the error {“errors”:[“app\_id notfound. You may be missing a Content-Type: application/jsonheader.”]} i dont under stand please can some one tell me what is wrong ![one signal problem](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/5/e/5e03c3bc7f0b2a42cdc806bcd96f9a3dc3cba719.png) ---
**Author:** ![pacecode](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/pacecode/32/209017_2.png) [@pacecode](https://community.thunkable.com/u/pacecode)\ **Post date:** [April 27, 2024, 11:59am UTC](https://community.thunkable.com/t/web-preview-works-vs-app-preview-errors-out-with-onesignal/2971980/2 "2024-04-27T11:59:24Z")
Do you have Added your app ID in your One Signal Setting? Also, do you test the App on Live Preview or APK ---
**Author:** ![superqueing5v53](https://avatars.discourse-cdn.com/v4/letter/s/fbc32d/32.png) [@superqueing5v53](https://community.thunkable.com/u/superqueing5v53)\ **Post date:** [April 27, 2024, 12:19pm UTC](https://community.thunkable.com/t/web-preview-works-vs-app-preview-errors-out-with-onesignal/2971980/3 "2024-04-27T12:19:21Z")
Yes all the app\_id there the api key is there all of the settings work in the browser live view . i only have 2 downloads a month as Im on a free acc and I used 1 that never worked let me try and get a apk and see if that works but like i said it sends from the onesignal browser window (web preview) ---
**Author:** ![pacecode](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/pacecode/32/209017_2.png) [@pacecode](https://community.thunkable.com/u/pacecode)\ **Post date:** [April 27, 2024, 12:39pm UTC](https://community.thunkable.com/t/web-preview-works-vs-app-preview-errors-out-with-onesignal/2971980/4 "2024-04-27T12:39:34Z")
Try in APK, it works in Live Test but I can say why isn’t it working there, everything seems to be correct from your side, you must contact Thunkable staff like @ioannis @matt_conroy ( But on 29 as they Did’nt work on Weekends ) * * * Want to hire a Certified Thunkable Expert? [Whoocoder | Thunkable Expert | Hire Now On Fiver!!](https://pro.fiverr.com/certified/thunkable?utm_source=fiverr_certified&utm_medium=homepage&utm_campaign=certified_home&service=thunkable-project&active_expert_id=147498421) ---
**Author:** ![superqueing5v53](https://avatars.discourse-cdn.com/v4/letter/s/fbc32d/32.png) [@superqueing5v53](https://community.thunkable.com/u/superqueing5v53)\ **Post date:** [April 27, 2024, 3:08pm UTC](https://community.thunkable.com/t/web-preview-works-vs-app-preview-errors-out-with-onesignal/2971980/5 "2024-04-27T15:08:11Z")
downloaded the apk and got the same error this is melting my brain ---
**Author:** ![pacecode](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/pacecode/32/209017_2.png) [@pacecode](https://community.thunkable.com/u/pacecode)\ **Post date:** [April 28, 2024, 1:16am UTC](https://community.thunkable.com/t/web-preview-works-vs-app-preview-errors-out-with-onesignal/2971980/6 "2024-04-28T01:16:03Z")
Try this by Creating a Push Notification Template. ![Screenshot 2024-04-28 at 6.43.48 AM](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/e/2/e29379374ec81cd1941f325512fadc81eaf6aa18.png) > **[Create template](https://documentation.onesignal.com/reference/create-template)** > > Create templates for push, email and sms visible and usable in the dashboard and API. * * * Want to hire a Certified Thunkable Expert? [Whoocoder | Thunkable Expert | Hire Now On Fiver!!](https://pro.fiverr.com/certified/thunkable?utm_source=fiverr_certified&utm_medium=homepage&utm_campaign=certified_home&service=thunkable-project&active_expert_id=147498421) ---
**Author:** ![superqueing5v53](https://avatars.discourse-cdn.com/v4/letter/s/fbc32d/32.png) [@superqueing5v53](https://community.thunkable.com/u/superqueing5v53)\ **Post date:** [May 1, 2024, 5:59am UTC](https://community.thunkable.com/t/web-preview-works-vs-app-preview-errors-out-with-onesignal/2971980/7 "2024-05-01T05:59:35Z")
I tried But with no luck i think its time to start learning FlutterFlow there are things in flutter that are a let easier to setup and handle ---
**Author:** ![pacecode](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/pacecode/32/209017_2.png) [@pacecode](https://community.thunkable.com/u/pacecode)\ **Post date:** [May 1, 2024, 8:59am UTC](https://community.thunkable.com/t/web-preview-works-vs-app-preview-errors-out-with-onesignal/2971980/8 "2024-05-01T08:59:49Z")
Not Flutter Flow, Learn a Bit Harder but for a Longer time, Android studio🙂 I’m Learning it too