Macro Images are broken

[Johannes Zimmermann]

Hey :-)

Does anyone else have the problem that the macros in the edit mode are broken? I can still edit them and they are correctly shown when i save the page. 

Does anyone has an idea how i could fix the problem?

PS: I just started to work with confluence :-)

 Things i tried: 

Change browser

Disable Macros

Restart Server

Confluence Version: 7.40 On Prem

Have a good day and thanks in advance :-)