While doing some tests we have accidentally hit the server too many times and I guess we are blocked now.
We have corrected the issue. IP 83.53..
Could you be so kind to unblock us so that we can continue the development? Sorry for the inconvenience.
Most blocks on OSM systems are automatic. They will expire in due course. The sysadmins have got better things to do than tidy up after you.
Make sure you’re following the Nominatim usage policy before trying again.