Hiya I found out to fix her issue. I looked in her Technic launcher log and saw Technic wasn't making a users.jason file. So here is the few steps.
1. Open your app data path if your on windows type run in the search bar and open the run menu.
2. Type %appdata% and open it.
3.Find your normal .minecraft folder and open it.
4. Look for a file called usernamecache.json
5. Copy and paste it in the .technic folder then rename it to users.json
6.Try logging on again.