TypeError: Cannot read property 'setJSMaterials' of null on Android using Expo

[ManuSense]

I am using expo and I just followed the installation guide with expo: https://viro-community.readme.io/docs/integrating-with-expo. Android build went fine but at runtime i got this error:

TypeError: Cannot read property 'setJSMaterials' of null, js engine: hermes C:\...\Material\ViroMaterials.js etc...

Any idea how to solve it?

Other info: "@viro-community/react-viro": "^2.41.1" "expo": "~50.0.4" "react": "18.2.0" "react-native": "0.73.2"

[linear[bot]]

XR-192 TypeError: Cannot read property 'setJSMaterials' of null on Android using Expo

[thekevinbrown]

I'm seeing the same on iOS.

[nab138]

I'm also seeing the same on ios

[LimitedDani]

I'm seeing the same

[thekevinbrown]

I fixed this by following the instructions here: https://viro-community.readme.io/docs/integrating-with-expo

Summation of Findings

1. The error effectively means, "Viro cannot load its native code".
2. To get it to load its native code, you need to link / build it in, which you do with the expo prebuild command, then running it that way.
3. This means you can't use Expo Go.
4. Should fix it for you!