The background seems OK, but
Mixed Content: The page at 'https://proinprivacy.nl/' was loaded over HTTPS, but requested an insecure image 'https://proinprivacy.nl/wp-content/uploads/2018/03/PIP-Logo-2.png'. This content should also be served over HTTPS.
(index):108 Mixed Content: The page at 'https://proinprivacy.nl/' was loaded over HTTPS, but requested an insecure image 'https://proinprivacy.nl/wp-content/uploads/2018/03/PIP-Logo-2.png'. This content should also be served over HTTPS.
(index):108 Mixed Content: The page at 'https://proinprivacy.nl/' was loaded over HTTPS, but requested an insecure image 'https://proinprivacy.nl/wp-content/uploads/2018/03/PIP-Logo-2.png'. This content should also be served over HTTPS.
(index):108 Mixed Content: The page at 'https://proinprivacy.nl/' was loaded over HTTPS, but requested an insecure image 'https://proinprivacy.nl/wp-content/uploads/2018/03/PIP-Logo-2.png'. This content should also be served over HTTPS.
(index):1 Mixed Content: The page at 'https://proinprivacy.nl/' was loaded over HTTPS, but requested an insecure image 'https://proinprivacy.nl/wp-content/uploads/2018/03/Dots-1.png'. This content should also be served over HTTPS.
(index):494 Mixed Content: The page at 'https://proinprivacy.nl/' was loaded over HTTPS, but requested an insecure image 'https://proinprivacy.nl/wp-content/uploads/2018/03/PIP-Logo-2.png'. This content should also be served over HTTPS.
jquery.js:4 Mixed Content: The page at 'https://proinprivacy.nl/' was loaded over HTTPS, but requested an insecure image 'https://proinprivacy.nl/wp-content/uploads/2018/03/PIP-Logo-2.png'. This content should also be served over HTTPS.
attr @ jquery.js:4
jquery.js:4 Mixed Content: The page at 'https://proinprivacy.nl/' was loaded over HTTPS, but requested an insecure image 'https://proinprivacy.nl/wp-content/uploads/2018/03/PIP-Logo-2.png'. This content should also be served over HTTPS.
attr @ jquery.js:4
jquery.js:4 Mixed Content: The page at 'https://proinprivacy.nl/' was loaded over HTTPS, but requested an insecure image 'https://proinprivacy.nl/wp-content/uploads/2018/03/PIP-Logo-2.png'. This content should also be served over HTTPS.
attr @ jquery.js:4
jquery.js:4 Mixed Content: The page at 'https://proinprivacy.nl/' was loaded over HTTPS, but requested an insecure image 'https://proinprivacy.nl/wp-content/uploads/2018/03/PIP-Logo-2.png'. This content should also be served over HTTPS.
Install the plugin “better search replace”. Search for https://proinprivacy.nl
and replace with https://proinprivacy.nl