The URI and Query String are simulating an RFI hacking attempt. To fix this problem do the steps below.
1. Copy the wp-admin htaccess code below into this BPS wp-admin Custom Code text box: 3. CUSTOM CODE WPADMIN PLUGIN/FILE SKIP RULES
2. Click the save wp-admin Custom Code button.
3. Go to the BPS Pro Setup Wizard page and run the Pre-Installation Wizard and Setup Wizard. For BPS free just run the Setup Wizard.
# customize.php skip/bypass rule
RewriteCond %{REQUEST_URI} (customize\.php) [NC]
RewriteRule . - [S=2]