Hi there …
The code itself is fine, the WDE0028 error might occur due to wide variety of reasons including an ISP delay, please try publishing your site and try again, if that still doesn’t solve the problem try using a VPN temprarily, whatever the result was, please report it to Wix support and provide them with your ISP name and country.
Side note: You’re not returning anything from the query, the time out might also occur due to this reason as well.