Hey Manu, happy to help you with this and any other questions you may have. Can I start by asking what version of the VOXL SDK you're using? /etc/modalai/voxl-tflite-server.conf is a file that is written upon flashing the SDK and so I'm surprised to hear the file isn't being found. If by some chance it got deleted, you might benefit from re-flashing the SDK.
Also in your email I saw you had some other questions about VOXL TFlite Server, maybe you'd like to post those here or create a new forum topic?
Looking forward to helping you on this!
Thomas Patton