Wrong url on embed code

[luferra]

trafficstars

Hi, on the src attribute on the embed code the prefix https is missing. As you can see from this short code <iframe width="100%" height="300px" frameborder="0" allowfullscreen src="//umap.openstreetmap.fr/it/map/.....

I've tried to embed it on a custom html block on a Wordpress website but I've encountered some issues (maybe the issues where taken by the cerberus plugin).

Is it possible to kindly fix it?. Thanks Cheers LF