Subscription email links broken

I get this broken link in all new emails.

https://topic.php/?forum=13&id=7&goto=lastmsg

@ GoNz0:

Thanks for the info. I will check the reason of the problem and hope, that it can be solved very soon by the hoster of my Forum.

EDIT:
The Forum software has just been updated.
Is your problem solved now or is it still present?

No the problem is still there. I just received an e-mail about a thread and the link was broken as reported.

it looks like the website URL is missing in the configuration for topic notifications.

@ plutomaniac and @ GoNz0:

Thanks for your feedback. The problem is meanwhile known by the experts of my hoster and hopefully solved very soon.

EDIT:
I just got the information from the hoster, that the problem will be solved tomorrow.