Embedding calendar with iframe

I'm trying to embedd my read-only shared calendar (via embed link) on a website. first and last arrow brackets are omitted below.

iframe width="400" height="215" src="https://fairkom.net/nextcloud/index.php/apps/calendar/embed/dfgsdfgsdfg"></iframe

When I open the webpage (a very simple one), it gives me the below redirection error message. I've found Git issue #1863 but I'm not sure if it is related. Should it actually work in the Nextcloud version that is currently used? Thanks.