access restricted - security rule - updating views

-- HikaShop version -- : 2.4.0
-- Joomla version -- : 3.4.1
-- PHP version -- : 5.4.40
-- Browser(s) name and version -- : FF
-- Error-message(debug-mod must be tuned on) -- : The page you are trying to access is restricted due to a security rule.

When trying to update any of the views in order to customize them, we're getting the following error:

The page you are trying to access is restricted due to a security rule.

If you believe the security rule is affecting the normal operation of your website, contact your host support team and provide detailed instructions how to recreate this error.
They will be able to assist you with rectifying the problem and adjusting the security configuration if needed.

The url for the page is:
administrator/index.php?option=com_hikashop&ctrl=view&task=edit&id=0|t3_blank|component|com_hikashop|cart|sendcart.php

The page is just a light blue page, with a white box and the text above in blue (no template applied to the page).

This is happening with multiple user access (including super admin access).

I'm also getting an error (with Firebug):

"NetworkError: 400 Bad Request - http:// ... /administrator/index.php?option=com_hikashop&ctrl=view&task=edit&id=0|purity_iii|component|com_hikashop|checkout|end%2Ephp"

(similar error on all the other view pages, just changing the specific file name at the end)

We do have Aeekba Admin Tools installed (including htaccess rules); however, I couldn't find any notes anywhere here (or on akeeba site) that indicated any compatability (or special configuration required) between the 2 extensions.

Also, this was working fine a few versions (of HS) before.

Any ideas what might be happening?

After doing some additional digging with our hosting company we found that this was being caused by a mod_security rule that was triggered (based on some excessive traffic to the site). So it had nothing to do with HikaShop.

I had this same issue and submitted a ticket with Site Ground. The support they provide is outstanding.
Here's the response:
...
I have carefully investigated your request and noticed that your IP address has triggered one of the mod_security rules installed on the server. I have disabled the particular rule by adding directives in the .htaccess file located in the administrator/ directory. The component is once again working as expected.
...

Thought I would share in case anyone else is on Site Ground with the same issue. My Site Ground Support ticket #: 1731238

Yes, if you have SiteGround hosting and have 'strange' things like this happen, always consider that SiteGround has all sorts of 'stuff' that they have running that may be effecting how your site performs (or doesn't in this case).
[This is why we finally left SiteGround.]

I had the same problem and told SiteGound about the ticket you referenced. They said it was a great help in resolving my problem. Many thanks for sharing it! Best regards, Jim