Domain setup not accepting .art tld

Hi guys, first of all, good job on the app.
Everithing looks great and easy to use.

Today I bought my .art domain and I had discovered that the domain setup here on Sleek, does not accept ???.art domains, shows an error message with “Provide a valid domain name”.

Is it because I don’t have the premium subscription or just a “bug”.

Kind regards.

Hey there any info on why .art domains are not accepted?