VERIFIED SOLUTION i
Has only been seen with PD versions 6.1.3 and 6.1.4
There have been some issues after upgrading to Portrait Dialogue 6.1.3 and 6.1.4 where the "Show in browser" URL shows the email message as code, rather than the properly formatted email.
This can happen after an upgrade, if the old web applications are not uninstalled and re-installed as part of the upgrade process, as described in the documentation.
ResolutionUPDATED: September 29, 2017
Please make sure that the old version of the Portrait Dialogue Web applications is uninstalled and the new version installed in its place.