Image Links Broken After Admin Directory Name Change

[sparkks]

This user has been denied support.

The "F" flag is causing this, the rewrite group in simple terms:
"If the request is not referred by this website, either the www or non-www version, and this is an image file do nothing with the request but send Forbidden header"

Should solve the issue, not sure what it's purpose is to be honest:

RewriteRule .*\.(jpg|jpeg|gif|png|bmp)$ - [NC]

Thank you for this. I've taken my notes.

You learn something new every day!