Valid API key says expired when logging in

[Kevin-Mok]

I've set up a local Estuary instance following the README and ran the following commands:

./estuary setup --username=<uname> --password=<pword>
./estuary --datadir=/path/to/storage --logging

I can successfully run POST and GET commands using the API key from the setup. Then, I ran Estuary WWW using:

npm install
npm run dev-production

The problem is when I try to log in using the API key that worked for the POST and GET commands, it says "Expired API key". Why is this happening?