HTTP Error 404. The requested resource is not found alert?

[Braduk]

I use Exquilla to get Microsoft Exchange emails in Thunderbird, all worked fine until this morning. Each time I click on an email I get a new tab opening in Thunderbird with the following:

HTTP Error 404. The requested resource is not found.

Any ideas?

[tanstaafl]

This is a duplicate of viewtopic.php?f=39&t=3059396 which I already answered. Please do not post the same problem in multiple forums, it's against the rules.

Locking.