That is an issue on your end. Disable/uninstall all AV, firewall and other security software. Right click run as admin on trainer. Match trainer version to game version.
try rebooting your computer.
I have the GOG patched version and all XP / Weight / Talent Points option do not work for me.
Here is the exe, as requested: www.speedyshare.com/8MUMs/witcher3.exe
I also do not have any AV and I am using the trainer as admin.
If you need anything else, please let me know.
Thanks in advance.