Olá,
Use sempre https:// para os links http://
Mixed Content: The page at '<URL>' was loaded over HTTPS, but requested an insecure image '<URL>'. This content should also be served over HTTPS.
VM287:1689 Mixed Content: The page at 'https://weltnet.com.br/' was loaded over HTTPS, but requested an insecure image 'http://weltnet.com.br/wp-content/uploads/2018/01/logo.png'. This content should also be served over HTTPS.
VM287:1691 Mixed Content: The page at 'https://weltnet.com.br/' was loaded over HTTPS, but requested an insecure image 'http://weltnet.com.br/wp-content/uploads/2018/01/logo.png'. This content should also be served over HTTPS.
VM287:1 Mixed Content: The page at 'https://weltnet.com.br/' was loaded over HTTPS, but requested an insecure image 'http://weltnet.com.br/wp-content/uploads/2018/02/weltbanner-1600x611-1.png'. This content should also be served over HTTPS.
VM287:1 Mixed Content: The page at 'https://weltnet.com.br/' was loaded over HTTPS, but requested an insecure image 'http://weltnet.com.br/wp-content/uploads/2018/01/Sobre-N%C3%B3s.png'. This content should also be served over HTTPS.
VM287:1 Mixed Content: The page at 'https://weltnet.com.br/' was loaded over HTTPS, but requested an insecure image 'http://weltnet.com.br/wp-content/uploads/2018/01/wallconect.png'. This content should also be served over HTTPS.
VM287:1 Mixed Content: The page at 'https://weltnet.com.br/' was loaded over HTTPS, but requested an insecure image 'http://weltnet.com.br/wp-content/uploads/2018/01/wallconect.png'. This content should also be served over HTTPS.
VM287:1 Mixed Content: The page at 'https://weltnet.com.br/' was loaded over HTTPS, but requested an insecure image 'http://weltnet.com.br/wp-content/uploads/2018/01/Sobre-N%C3%B3s.png'. This content should also be served over HTTPS.
Olá @lukesantana,
Pelo que percebi você já corrigiu o problema, certo? Normalmente problemas assim acontecem porque a página está disponível via https, mas as chamadas por imagens e scripts feitos por ela são via http (sem o s). O cadeado verde do SSL não tem nenhuma relação com esconder o código-fonte da página ou coisa parecida, pode ficar tranquilo.
Não esqueça de contar como resolveu o seu problema e marcar seu tópico como resolvido, beleza?