Connectors/index.php error NOT mod security

Hi guys, I have a vps with all the right requirements. When I try to save a template on my modx install, or a chunk with any code in it I’m getting the following console errors:

[Error] Failed to load resource: the server responded with a status of 403 (Forbidden) (index.php, line 0) (connectors/index.php)
[Error] TypeError: this.mask.addClass is not a function. (In 'this.mask.addClass("fade-in")', 'this.mask.addClass' is undefined)
	onShow (modx.jsgrps-min.js:1:114390)
	afterShow (ext-all.js:21:375934)
	show (ext-all.js:21:375358)
	show (ext-all.js:21:387130)
	onAjaxException (modx.js:122)
	fire (ext-all.js:21:3705)
	fireEvent (ext-all.js:21:693)
	handleFailure (ext-all.js:21:51291)
	f (ext-base.js:21:18146)
	m (ext-base.js:21:18304)
	(anonymous function) (ext-base.js:21:8610)

[Error] Failed to load resource: the server responded with a status of 404 (Not Found) (, line 0)

and if I navigate to connectors/index.php I see the following:
{"success":false,"message":"Access denied.","total":0,"data":[],"object":{"code":401}}

So I go to my code and see this:

/* check for anonymous access or for a context access policy - return error on failure */
if (defined('MODX_REQP') && MODX_REQP === false) {
} else if (!is_object($modx->context) || !$modx->context->checkPolicy('load')) {
    header("Content-Type: application/json; charset=UTF-8");
    header($_SERVER['SERVER_PROTOCOL'] . ' 401 Not Authorized');
    echo json_encode(array(
        'success' => false,
        'code' => 401,

Gotcha. I’m going to see 401 anytime I try to access that file with a browser. Ok.

So I search forums. I find that EVERYONE has this issue who has mod security. Cool So I disable it. First on the domain then on the whole server.


I explain all of this to my tech support team at the datacenter. They insist this isn’t a server problem.

It’s a server problem.

I’m pretty darn sure that forbidden error is because of some security rule. I’ve checked file and directory permissions and cleared cache by hand and with the button. Flushed permissions. used a private browser. Changed my session variable in the settings to “/” and to “/modx/” which is my current subdirectory. I’ve installed by hand, different versions. I’ve used Softaculous. Same issues. I’ve checked the server logs for ANYTHING I can find.

I can duplicate a template with code in it. It works. (Dupe the included base template)

I can also create an empty template. Chunks or templates with html seem to trigger it. I saved a chunk of php successfully in a template.

There is no cloudflare running.

This is for me, to create a modx site for the new fantasy fiction book that I have written. FREE COPY to whoever helps me figure this out. I really need help.

It only happens when saving a chunk or a template, and the rest of the manager works as expected? What about when you save a chunk or template that is completely empty?

empty is ok. I think there are issues with extras too but I havent tested yet. my sysadmin died and we had to move everything and this has been a consistent problem since we moved. one of the sites we did just suddenly started working. i am completely mystified

v 2.7.1

paths are ok and correct. nothing in my error log

I just successfully installed FormIt and some other Extras so I’m ok there

If it looks like a duck, swims like a duck, and quacks like a duck, then it is a duck mod security.

1 Like

I didnt trust my datacenter guys and so I installed my own modsecurity plugin in the WHM to turn it off. I turned it off myself and still nothing. I’m using ConfigServer ModSecurity Control - cmc v3.02 and turned it off for the domain, tested. nada. then the entire server. tested. nada. I agree with you but the only other security package I’m seeing is ConfigServer Security & Firewall - csf v12.11 which doesnt DO stuff like this. It’s not my culprit.

the rule for the domain is GET /

Action Description:

Access allowed (phase 1).


Pattern match “” at SERVER_NAME.

All I can say is that the behaviour you describe (only happens on certain requests with certain (html) content, 403 error returned) matches the symptoms of mod_security (or a similar WAF/firewall solution) perfectly. Perhaps there’s another package running, or a reboot/reload is needed for your changes to take affect.

The only other potential reason I can think of is MODX ACLs, but as you’ve indicated it’s a personal project (and you know your way around MODX well enough), I have serious doubts you would’ve configured element access in a way that would prevent you from, say, editing elements in specific categories. Easy to rule that out too, by enabling sudo mode on your user (if it wasn’t already).

Other potential causes that your description of events have already been ruled out:

  • File/directory permissions, as that would trigger on any request, not just requests with certain content.
  • Even file permissions on the specific processor file itself is not the root cause if you can still save the same type of element if it is empty.
  • Some sort of redirect causing access tokens (MODAUTH/session cookie) to get lost would also not happen on specific elements only.

Also, very sorry to hear about your loss.

thanks. we have had a rough year.

There are no ACLs. I was wondering about the session cookie. But I tried setting it and testing and it was the same. There is a place for me to disable all rules I’m going to try that.

I disabled all rules. same thing. The “forbidden” error is being caused by SOMETHING. Going to go back to the datacenter geeks. I don’t know what else to do. I’m paying a lot for this server and need this to just work.

ok so I have a Wordpress blog at the domain in question, to be replaced by my shiny new modx site. AND the problem was my Wordfence plugin which is awesome but apparently conflicts with MODX. If it is activated then we get this behavior. It didnt even occur to me that it might be an issue. Hope it helps someone else.



Glad you tracked it down finally.