Hello everyone. I downloaded the companion (1.0.5) from https://companion.niotron.com and installed it on my phone but when using the live test it does not work, it closes automatically when scanning the code, writing it, or using the automatic connection, I have not been able to test my application, I have already tried in several browsers and on several android devices and it does not work. 
Your app might have some issues, try testing a blank app first
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Working fine for me, maybe your internet issue.