[URGENT!] Unity crashing when I level up my character in game?

Hey guys, I am making an RPG, I had this working before, I haven't changed anything so I'm a bit stumped. Basically when I get exp my exp fill bar fills up, then upon leveling it increases my level, updates the EXP I need for next level and that is that;

However, upon setting up my first quest, my game/unity crashes when I level up. I have the Editor.log Here but I have no idea what I'm actually looking for in here, any help would be super appreciated!

I'm also unsure what code I should provide let me know what you need and I'll post it, I'm thinking it's the level up event it's self so you can find that below;

  public void GetExp(float exp)
 {
     
     experience += exp;

     float xpNeeded = GameInfo.ExperienceForNextLevel(Level*10);
     float previousExp = GameInfo.ExperienceForNextLevel(Level - 1);

     while (experience >= xpNeeded)
     {
        LevelUp();
         xpNeeded = GameInfo.ExperienceForNextLevel(Level);
         previousExp = GameInfo.ExperienceForNextLevel(Level - 1);
     }
     
     experienceBar.Find("fillBar").GetComponent<Image>().fillAmount = (experience - previousExp) / (xpNeeded - previousExp);
     Debug.Log("EXP TO NEXT LEVEL : " + xpNeeded.ToString());
     CurrentEXP = experience;
     RequiredEXP = xpNeeded;
 }

 void LevelUp()
 {
     level++;
     levelText.text = "Level : " + level.ToString();
 }

Any suggestions welcome or even if you guys could point me in the right direction of reading the log, this is my biggest project yet so are still somethings I'm new to xD

Have a nice day :)