Dark Reader will not function on Safari as it did before, why?

Hi Silverfox1979,

Thank you for using the Apple Support Communities! Are you able to adjust the settings listed below:

Hide ads when reading articles in Safari on Mac

"Change how your webpages look in Reader

1. In the Safari app  on your Mac, while viewing an article in Reader view, click the letter button  that appears at the right end of the Smart Search field.
2. Do any of the following to adjust the settings:

• Choose a font size.
• Choose a white, sepia, gray, or black background.
• Choose a font.

Reader always shows you the last font, size, and background you chose."

Thank you.