small fix

public/index.html

@@ -138,7 +138,7 @@ function app() {
         const elapsed = (lastTokenAt - this.lastTokenAt) / 1000
         this.lastTokenAt = lastTokenAt
         if (elapsed > this.timeoutInSec) {
-          console.log(`Something went wrong, it too more than ${timeoutInSec} seconds to generate a token.`)
+          console.log(`Something went wrong, it too more than ${this.timeoutInSec} seconds to generate a token.`)
           this.state = 'stopped'
           return
         }