Nichts passiert, wenn ich auf die blauen Links der E-Mail-Betreffzeilen unter /admin/email-logs/received klicke

[ToddZ]

Sieht so aus, als wäre dies hier angesprochen worden:

Received email can't be viewed in the Email logs

Thanks for reporting it! It seems we are unconditionally wrapping the subject in a link even if there’s nothing to link to… We’ve added a fix, which will be included the next time you update Discourse