When adding an announcement pictures keep turning pink

Summary:

Content (required):

Hi Expert,

Whenever we are trying to add an image as an announcement, it turns a funny pink and green colour. Is there something that we are doing wrong, this has happened twice now. Just want some clarity on why this is happening and the best way to prevent it.

Thank you for your help.

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):