Duck Dns "Failed to save add-on configuration .."

Hi All,
While trying to save configuration on duck dns i encountered the following errorr:

Failed to save add-on configuration, Missing required option ‘domains’ in Duck DNS (core_duckdns). Got {‘domains’: [None, ‘xxxxxxxx.duckdns.org’], ‘token’: ‘xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx’, ‘aliases’: , ‘lets_encrypt’: {‘accept_terms’: True, ‘algo’: ‘secp384r1’, ‘certfile’: ‘fullchain.pem’, ‘keyfile’: ‘privkey.pem’}, ‘seconds’: 300}

Here’s my config file other than domain and token

accept_terms: true
algo: secp384r1
certfile: fullchain.pem
keyfile: privkey.pem

I am new to HA on Raspberry Pi5 and the System is with latest updates

TIA

Looks like you just need to press the ‘X’ on the empty field above the domains.