Barcode suddenly stop working

I have an app that's being used for about 2 months now and had no problems. Suddenly today, the barcode is not working anymore. When I click on the barcode button, nothing happens, the barcode scanner does not come up.

I have restored a previous working version of the app to a new app and still have the same issue. What happened? There was no code change and the barcode just stopped working.

We are using the app via the appery.io tested on an android.
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