Mixed Content removal from WordPress, can someone please help me with the details on how to fix it

Use SSL Insecure Content Fixer plugin. Select Simple option in its settings, first. Move to next option, if it does not fix mixed content completely. Repeat this, with next option, until all is fixed.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)