idloom.events uses required session cookies for security reasons. If you embed your form on your website and your visitor browser is set to block third-party cookies, you may encounter an error message prompting you that your browser is preventing cross-sites' requests and offer you the opportunity to open the registration form in a new window.
This happens when you use different domains for the form and the website you embed it on. e.g., embedding a form hosted on https://myaccount.idloom.events on your website hosted on https://www.mydomain.com.
The workaround consists in using the same root domain for both the registration form and the website you embed it on. e.g., change https://myaccount.idloom.events to https://registration.mydomain.com. In that case, idloom.events cookies won't be considered as third party cookies anymore.
Contact your account manager for more details.