IEH2 Hotfix

Fixed: Hero EXP, Hero Fame and Pet EXP requirement was wrong in the [ver. 2.2.1.3].

We sincerely apologize. In the previous patch [ver. 2.2.1.3], while rewriting some code to improve performance, the EXP calculation formula was mistakenly altered. Please update to the latest hotfix patch as soon as possible to resolve this issue.Thank you for your understanding :)