Button sms zapier "error" on click

My app’s URL: app.moneybounce.eu but you have to onboard first on moneybounce.eu

I can’t understand why, but when i click on the “send sms” button i configured, it shows “error”, however it does work when i’m on my computer.
I used Twilio and Zapier to configure the SMS sending;

Any idea ?
Thanks !

Did you ever force close and reopen the app or reinstall the app on your phone after setting up your zap button? I wasn’t sure if I was allowed to follow through with your onboarding to get access to your app, so I didn’t follow through with it.