Invalid landing page URL
I am writing about a problem with the landing page URL which won't let me continue creating my campaign.
I get the error "Invalid landing page URL" with the link https://writer.dek-d.com/pithkun/story/view.php?id=1625134 and had changed the "=" sign to "%3D" or "/" but it didn't work. The homepage domain and the landing page domain are the same.
Is there any way to fix this problem?
Thank you for your assistance in this matter.