It's good that your hosting provider have something like this to protect your website. The alert is usually caused by the 'Second level' filter and despite I have tried everything mod_security detects it as a threat.
There is a way to disable the rule; just put something like this in the .htacess:
If that doesn't work or you can't disable mod_security rules then there is another trick: Using phpmyadmin or similar look for the "securitycheckpro_storage" table and there edit the entry matching "pro_plugin". Look for the second_level_words filter and remove all the content between the two double quotes (red lines in the screenshot):
This will delete all the words from the second level filter so the mod_security rule should not be applied.
I have tried all your suggestions but none are working.
The host said they could whitelist the rule for the domain or cpanel account but was hoping to get a resolution that I could implement.
Appreciate the help.