sandbox iframe yellowWarning sentry-expo:2.0.3

[vicenteconejerosdelacruz]

OS:

• Windows
• MacOS
• Linux

Platform:

• iOS
• Android

SDK:

• @sentry/react-native
• react-native-sentry
• expo-sentry

SDK version: "sentry-expo": "^2.0.3"
react-native version: "https://github.com/expo/react-native/archive/sdk-35.0.0.tar.gz"

Are you using Expo?

• Yes
• No

Are you using sentry.io or on-premise?

• sentry.io (SaaS)
• on-premise

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I have following issue: while debugging on android Getting a Yellow Warning Could not create sandbox iframe for pure fetch check, bailing to window.fetch: TypeError: null is not an object (evaluating 'sandbox.hidden = true')

Description goes here
i was able to hide the issue by just commenting the line
logger_1.logger.warn('Could not create sandbox iframe for pure fetch check, bailing to window.fetch: ', err);
on supportsNativeFetch

the issue seems to be the lines
var sandbox = doc.createElement('iframe');
sandbox.hidden = true;
because doc.createElement('iframe'); is returning a null value hence the assignment will throw the error

i'm not sure if this will allow me to debug crashes(which is why i'm installing sentry in the first place) but sending
Sentry.captureException(new Error("Something broke"));
works well and it's visible in sentry dashboard

Steps to reproduce:
-call Sentry.init on App.js

Actual result:

• Getting a Yellow Warning Could not create sandbox iframe for pure fetch check, bailing to window.fetch: TypeError: null is not an object (evaluating 'sandbox.hidden = true')

Expected result:

• No warning at all or at least some message hinting on how to solve the issue(if possible)

[vicenteconejerosdelacruz]

just to clarify, i'm using debug flag in the init function, so removing the debug flag of sentry.Init makes the warning to go away.

[AliTonbul]

Hi @vichoconejeros , have you had any luck with this issue. I pulled in expo-pixi package and since then I have been getting this error aswell

[vicenteconejerosdelacruz]

Hi @AliTonbul by removing the debug flag from the init i was able to run sentry. I'm also using expo-pixi but i'm not sure if its related
Regards