[Bug] Error when sharing a route

[slothful-vassal]

Hi,

when I want to share a route, the selected user does not appear in the share modal dialog and in the database log the following error is shown: "open templates/mail/notification.html: no such file or directory"

The same log entry appears, when adding a comment to a route of an other user.

But the curiosity is: the share/comment has been added succesfully. After refreshing the page, the share icon is visible and the other user can see the trail.

What could be the reason for this behaviour?

Many Thanks.