Media on Wiki notifications doesn't get displayed

[Happy-Ferret]

Having added this integration to our company GitLab/Mattermost instance yesterday, I found this to be a very pleasant experience. Kudos to that!

Unfortunately, one thing that doesn't seem to work is displaying Wiki change notifications.

While text is properly displayed, local media files (images, for the most part) are not.

The element links to

<URLofMattermostInstance>/uploads/<commitID>/<nameOfFile>.<fileExtension>" `

(i. e. https://localhost:4443/uploads/0cad766c6370cb1221d62883c21c04ed/image.png).

A path that doesn't exist.

Is there anything I can do to alleviate this?