Gemini API Quota Error Even Though I Haven’t Used It in 2 Days?

I’m trying to generate some code using Gemini 2.5 Pro experimental through Google Firebase Studio. I added a simple request to include a Google login button, but when I tried to run it, I got this error:

“You exceeded your current quota, please check your plan and billing details.”

What’s weird is that I haven’t used the API in the past 2 days, so I don’t understand how I could’ve exceeded the quota. To double-check, I even tested it using two completely different Google accounts, and I still got the same message.

Is this a bug? Or is there something I’m missing like a global quota limit or delayed usage tracking?