In this topic you have not provided any information whatsoever so I’m not sure what you expect from filing an issue for MCCI LMIC on Github.
Your issue will very probably not be caused by a shortcoming in MCCI LMIC.
If you want to get any useful input on this forum you will at least have to provide sufficient detailed information about your problem, what exactly is not working, what you have tried, what sketch you are using, what settings and pin mappings you have used, what error messages do you get, etc.
You can use the search option to find any relevant information for your issue on the forum.
Also don’t paste links without any further description (e.g. Github).
Users on the forum don’t like having to go elsewhere to read your information.
Try the steps already described on the forum.
If something is not working it is usually ones own fault (e.g. incorrect settings used, typo’s, not carefully following steps provided) and not because a bug in examples, libraries etc.
And if you do not setup the power management chip on a T-Beam v1.x correctly then it will not connect to TTN.