Flow Port account creation fails with Ledger

There is a problem to create a new Flow account with Ledger using Flow Port.

Authentication with Ledger on port.onflow.org was successful, but when I try to press “Create new account”, it fails with error.

I tried to check DevTools console and network errors. There, I noticed that network request to “POST https://hardware-wallet-api-mainnet.onflow.org/accounts” fails with error { "error": "service out of available accounts" }.

I am not sure if there is any public limit for accounts which can be created on Port. There is no clear feedback on it.

How can I address this problem?