I’ve also looked through your support cases and found this thread, if I click on this individuals Share this link I get the same, so it is not related to just my site. I have to doublecheck my others that are using your theme.
I’ve updated my sites to Cardinal Version: 2.6.11 and Swift Framework Version 2.5.22 and I am still getting this when I choose “share” and choose the option to email.
Can you confirm if it was in the update I’ve applied or will this be released in another?