The Forum Topic is under the actual error message search term – “Request exceeded the limit of 10 internal redirects”, but I will leave this Forum Topic as an alternative search term.
This Forum link has older information due to changes in newer versions of BPS. The new method of troubleshooting this has been added below and will be updated in the Forum Topic link below.
http://forum.ait-pro.com/forums/topic/request-exceeded-the-limit-of-10-internal-redirects/#post-1430
Click the Root folder BulletProof Mode Activate button. If the problem is solved stop here.
If the problem is not solved then do this next:
Go to the BPS Security Log tab page and click the Turn Off Error Logging button.
If the problem is still occurring then you have some sort of Permalink problem or something else is interfering with URL rewriting – ie another plugin, DNS settings in your Host control panel, using various cPanel Tools that are broken/do not work correctly.