Invalid Redirect when clicking e-mail unsubscribe links for forum topic digests

[JohnnyBook]

From e-mail:

Dear xxxxxxx,

You are subscribed to the thread "Library Management: various questions not worth their own thread" by ownedbycats, there have been 1 post(s) to this thread, the last poster was zzzzzzzzz.
https://www.mobileread.com/forums/sh...d.php?t=355273

These following posts were made to the thread:
************

https://www.mobileread.com/forums/showthread.php?

------- SNIP----

Unsubscription information:

To unsubscribe from this thread, please visit this page:
https://www.mobileread.com/forums/su...cbe7137f284667


Anytime I click the link I get this error:

Message
Invalid Redirect URL (https://mail.yahoo.com/)

This applies to any message from different topics.

If I click the same link a second time I get this error:

Message
An invalid threadid or forumid was specified.


The threadID and forumID should not be invalid they are what the messages supplies.

It occurs wheather I am logged into mobieread or not. Same results.