XF 1.5 403 Error When adding Javascript

I am trying to ad this adblock detect code to my site:

#veEJgfawLXQc {
display: none;
margin-bottom: 30px;
padding: 20px 10px;
background: #D30000;
text-align: center;
font-weight: bold;
color: #fff;
border-radius: 5px;

<div id="veEJgfawLXQc">
Our website is made possible by displaying online advertisements to our visitors.<br>
Please consider supporting us by disabling your ad blocker.

<script src="/ads.js" type="text/javascript"></script>
<script type="text/javascript">



But I get this:

Screen Shot 2017-03-08 at 7.19.32 PM.png

Could it be something with my .htaccess file?


XenForo developer
Staff member
If you're getting that while trying to save the template, you should contact your host. Something like mod_security is blocking the request.