From the google groups (Tobias):

we have an editor who wanted to state that submissions to their track is via email, so for the “submission link” field in “Call for Contributions Page Content” (or similar) component, they entered

mailto://email@example.com

This also shows up on the final page. However, the // is wrong in a mailto link.

It seems you did not intend to have non-http urls there (the error message is “Malformed URL, make sure the protocol (e.g. http:// or https://) is included”).

Please either only allow https:// and http:// explicitely or remove the check for “//” (preferred) because not every protocol needs them.

Submitted by Elmer van Chastelet on 15 September 2016 at 07:45