FMLDeobf Tweaker [main/DEBUG] [FML/]: Loaded 57 rules from Access Transformer config file fml_at.cfg [main/DEBUG] [FML/]: Loaded 89 rules from Access Transformer config file forge_at.cfg [main/DEBUG] [FML/]: Loaded 3 rules from Access Transformer mod jar file C:\Users\shazaam\Desktop\Server\mods\fossilsarcheology-7.3.2.jar! META-INF/fossil_ [main/DEBUG] [FML/]: Loaded 8 rules from Access Transformer mod jar file C:\Users\shazaam\Desktop\Server\mods\llibrary-1.5.0-1.7.10.jar! If you get an invalid username or password error, the cause is more than likely that your username is incorrect.
So as a first step, make sure you try both your IGN and Email address as the user name.
LLibrary Transformer [main/TRACE] [FML/]: Registering transformer net.ilexiconn.llibrary.patcher.
LLibrary Runtime Patcher [main/INFO] [FML/]: Found runtime patcher net.ilexiconn.llibrary.patcher.
If that still fails, then you will need to use Minecraft to verify your credentials.
If you are already logged in, you will not be able to see the user name.
This makes sure the user has LLibrary installed and that it's the correct version.