Delete trainer and all files in
Learn how to make your own Trainer Cleaner for the above paths Here. Link
Reboot PC to clear excess memory, get a fresh copy of latest trainer and extract it. Run trainer as admin, read the instructions and try again. At times, a new game may be needed to resolve failed options if the data in your save file was altered. Use on a new game and test the option. If it now works, quit to main menu and load your save and try it again.
It seems there is a hardcoded limit of 70 skill points (aside from relic). It sounds like there is a way around it using Cheat Engine, but I don't know if it actually works or won't mess up your save...