You can safely turn off the “Strict Standards” warnings for a cleaner log output. See: OJS 3.0.2 Pre-installation error when running index.php - #2 by ctgraham
Eliminating the Strict Standards warnings leaves one of interest: Warning: file_get_contents(): https:// wrapper is disabled in the server configuration by allow_url_fopen=0
To use ReCAPTCHA successfully, you (or your hosting provider or system administrator) will need to enable allow_url_fopen at the PHP level. This is usually done by modifying the “php.ini” file, but this will vary based on your system. Check with your hosting provider support or friendly system admin for more information.