Thanks, I removed the IP from server whitelist and it works. But now got this error message on top of the page:
Warning: unlink(https://8theme.b-cdn.net/tmp/picture-CEdLr4.tmp): No such file or directory in /home/customer/www/test.websiterobots.com/public_html/tasi/wp-content/plugins/et-core-plugin/app/controllers/authorize.php on line 701
Warning: Cannot modify header information – headers already sent by (output started at /home/customer/www/test.websiterobots.com/public_html/tasi/wp-content/plugins/et-core-plugin/app/controllers/authorize.php:701) in /home/customer/www/test.websiterobots.com/public_html/tasi/wp-includes/pluggable.php on line 1002