Witcher 3 has an all new system when it comes to rewarding experience points, this system works when the player starts doing quests that are below the recommended level or simply greyed out in the journal. Once you complete any of that quest, the experience level gained by completeing that quest will be just a mere 1. That’s not an ideal situation as many players often lose track of the quests they’re doing and theat ends up creating leveling propblems. Luckily, considering how Witcher 3 is very easy to mod, there is a simple tweak available that will help you remove that annoying experience system and gain full experience from quests that are greyed out.
The tweak works with both 1.10 and 1.11 and needs to be copied in the mods folder of your Witcher 3 directory. You can download the tweak from here, extract it and then place in the mods folder and you’d be good to go. In case you are having script compilation errors, you can follow the simple steps in this guide to help you resolve that issue.