React-Native app with webview for HubSpot Form showing 405 error on submission

Developer Support APIs & Integrations
1

We have our own app (react-native) which has a webview loading a NextJS website
Our Feedback form page is simple and the form submission submits correctly when viewing the NextJS site/page outside of the app within Safari or Chrome:

<Script
type='text/javascript'
src='//js.hsforms.net/forms/embed/v2.js'
onReady={() => {
// -expect-error
hbspt.forms.create({
region: 'na1',
portalId: '3871135',
formId: '4270dfaa-99e6-4e2a-9374-b389634cee51',
target: '#feedback-form-container',
});
}}
/>
<div id='feedback-form-container' />

The form creates properly on app and web. And the form submits properly on web
However, while in the app, when I submit the form I am redirected out of the app to this page: https://forms.hsforms.com/submissions/v3/public/submit/formsnext/multipart/3871135/4270dfaa-99e6-4e2a-9374-b389634cee51
which shows:

HTTP ERROR 405

Reason:

Method Not Allowed

Should I be using a webhook/api instead of generating this form with my usual web script?
Any thoughts on why the 405 is occuring only inside of the app?

2

I ended up creating a custom form inside of NextJS w/ a custom function to submit the form data to HubSpot’s api
The new NextJS server actions gave me the same 405 “method not allowed” error, however when I used a client fetch/post, the api worked correclty
I’m still not sure why I was getting the 405 error, but at least I have working forms