wcast-track-order / bug?

Hi there,

I have the following issue when using your plugin:

If customers try to open/track their order within their shipment email the order cannot be tracked and a pop up window opens and on which it says:

Shipment tracking

Hi there,

I have the following issue when using your plugin:

If customers try to open/track their order within the shipment email they have received the order cannot be tracked and it looks something like this:

Shipment tracking
wcast-track-order

What is causing this and how do I fix this problem? They get the same screen in case they click on the tracking number of the forwarder as well.

Looking forward to hearing from you and thanks for your help in advance!

Best,`
Alex