Unable to upgarde

Sometimes I wonder, why me? In life, things never seem to go as I wish. This time, I felt a sharp pang in my chest—a feeling so strong it almost made me think I was about to have a heart attack. The moment I tried to upgrade my stats, the system message that appeared made me feel like puking.

My stat upgrade window was blocked. How could this happen you might ask. Well, who else but the fucking Creator himself could have messed with me? It didn't make sense. Why else would I be blocked?

I stared at the screen again, wondering if I had done something wrong, or maybe I didn't wish hard enough. As if... What?

No matter how much I tried, the + button wouldn't work.

"System help!" I called out, frustration spilling over.

[Welcome to the customer service center, Lee Gaon. It's been a long time]