These warniings appear in the console:
Mixed Content: The page at 'https://financial-grind.com/' was loaded over HTTPS, but requested an insecure image 'http://financial-grind.com/wp-content/uploads/2017/11/board-1572084_1280.jpg'. This content should also be served over HTTPS.
2other.js?ver=1:53 Mixed Content: The page at 'https://financial-grind.com/' was loaded over HTTPS, but requested an insecure image 'http://financial-grind.com/wp-content/uploads/2017/11/board-1572084_1280.jpg'. This content should also be served over HTTPS.
(anonymous) @ other.js?ver=1:53
jquery.js?ver=1.12.4:3 Mixed Content: The page at 'https://financial-grind.com/' was loaded over HTTPS, but requested an insecure image 'http://financial-grind.com/wp-content/uploads/2017/11/board-1572084_1280.jpg'. This content should also be served over HTTPS.
Install the plugin “better search replace”. Search for http://financial-grind.com and replace with https://financial-grind.com.
When done, clear any cache and then you can delete the “better search replace” plugin.