Mixed Content: The page at 'https://redkitajans.com/' was loaded over HTTPS, but requested an insecure image 'http://demo.athemes.com/atu-agency/wp-content/uploads/sites/86/2018/06/books-business-computer-459654.jpg'. This content should also be served over HTTPS.
(index):1 Mixed Content: The page at 'https://redkitajans.com/' was loaded over HTTPS, but requested an insecure image 'http://redkitajans.com/wp-content/uploads/2020/02/70-3-scaled.jpg'. This content should also be served over HTTPS.

yukarıda http ile gelen iki resim dosyası görünüyor. Bunların https olarak değişmesi lazım.

http://redkitajans.com/wp-content/uploads/2020/02/70-3-scaled.jpg

http://demo.athemes.com/atu-agency/wp-content/uploads/sites/86/2018/06/books-business-computer-459654.jpg

aşağıda @umutyildiz; css dosyasını vermiş. CSS içinden yukardaki url leri bulup düzeltin.