Companion not working

Download platform tools from here:

https://developer.android.com/studio/releases/platform-tools.html

Extract the folder and place it directly into your C: drive

Copy the next lines into a new
*.bat file:

cd C:\platform-tools
adb logcat

For more information read this:
https://groups.google.com/forum/m/#!searchin/mitappinventortest/Logcat/mitappinventortest/uQbqOEZUFPk