Help with fixing/implementing dynamic subdomains for bubble.io

Currently using Saasalias on bubble.io for subdomain solution, however, keep getting error 1000 from cloudflare. Seeking help and suggestions to fix this plugin, or to use/develop an entirely new solution. Currently users can register for their own website (customerwebsite.mywebsite.com), and that's as far as the functionality goes.

Looking for the lowest cost way to achieve this.