Title: Request error not JSON, insert post not loading
Last modified: August 30, 2016
---
# Request error not JSON, insert post not loading
* Resolved [karencheah](https://wordpress.org/support/users/karencheah/)
* (@karencheah)
* [10 years, 10 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/)
* Recently we encountered an error when trying to insert a post during newsletter
creation. Please see pasted error
* ```
Request error not JSON:
403 Forbidden
403
Forbidden
Access to this resource on the server is denied!
```
* So we updated WordPress and Mailpoet to the latest versions. Now when we tried
to insert post in the newsletter, the popup page with the list of posts is loading
indefinitely and does not display any posts. Please advise. Thanks.
* [https://wordpress.org/plugins/wysija-newsletters/](https://wordpress.org/plugins/wysija-newsletters/)
Viewing 15 replies - 1 through 15 (of 19 total)
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* Thread Starter [karencheah](https://wordpress.org/support/users/karencheah/)
* (@karencheah)
* [10 years, 10 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6306798)
* Just another note that when we try to insert the post in the newsletter, it results
in this on the server…
* `Error! IP was blocked - block Removed. Block Reason: csf.deny: 114.77.126.182#
lfd: (mod_security) mod_security`
* Then I have to manually unblock the IP.
* This happened about 3 times already. I think it could be related.
* [Valerio Vaz](https://wordpress.org/support/users/vvaz/)
* (@vvaz)
* [10 years, 10 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6306881)
* Hi, do you have any security plugins enabled in your website?
* Can you please check if you can access wp-admin/admin-ajax.php on your website?
It should return a “0” if it’s ok.
* Thread Starter [karencheah](https://wordpress.org/support/users/karencheah/)
* (@karencheah)
* [10 years, 10 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6306915)
* Thanks for your response, vvaz. We haven’t got any security plugins and no change
in plugins since everything was last working alright so that’s really strange.
We only have 2 plugins which is Mailpoet and Events Manager (Pro).
* I’ve checked wp-admin/admin-ajax.php and it’s returning “0” so it’s ok.
* Anything else I can check? Thanks!
* [felix_ardeleanu](https://wordpress.org/support/users/felix_ardeleanu/)
* (@felix_ardeleanu)
* [10 years, 10 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6306953)
* Hi,
* I am having the same problem with my websites. I understand from my hosting provider
that the problem is caused by an well-known vulnerability called ModSecurity (
CVE-2014-3907).
The guys from MailPoet should fix this as quickly as possible.
My hosting provider has configured some restrictions, for security reasons. Until
this problem is resoved, I cannot use MailPoet 🙁
* [Valerio Vaz](https://wordpress.org/support/users/vvaz/)
* (@vvaz)
* [10 years, 10 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6306969)
* Hello,
* You should read the CVE-2014-3907 link in: [http://www.cvedetails.com/cve/CVE-2014-3907/](http://www.cvedetails.com/cve/CVE-2014-3907/)
So, if you have the latest version of MailPoet installed (you should!) you don’t
need to worry. This relates to 2.6.11 (almost a year ago), we’re now on 2.6.16
The problem here is that your mod_security shouldn’t trigger any warning. We
suggest that you ask your host to update the mod_security lists because they’re
outdated.
* Thread Starter [karencheah](https://wordpress.org/support/users/karencheah/)
* (@karencheah)
* [10 years, 10 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6306987)
* Hi Valerio,
* I noticed that you’re right to say that the older version of MailPoet had the
mod_security issue as the IP blocks that I’ve reported actually happened before
we upgraded. So after upgrading, I noticed that the IP block did not happen but
it’s still not working.
* It could be a different problem now, the list is just loading when trying to
add a post when drafting the newsletter. Just can’t add any posts into the newsletter.
Please help!
* Thread Starter [karencheah](https://wordpress.org/support/users/karencheah/)
* (@karencheah)
* [10 years, 10 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6306988)
* Hi Valerio,
* I have contacted the host and they have asked me to test turning off mod_security
using htaccess. I’ve done that and now I can insert posts into the newsletter.
* The question is whether it is advisable to turn off mod_security or is there
a solution that won’t conflict with mod_security. We do have the latest MailPoet
ver 2.6.16.
* Please advise. Thanks!
* [felix_ardeleanu](https://wordpress.org/support/users/felix_ardeleanu/)
* (@felix_ardeleanu)
* [10 years, 10 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6307006)
* Hello Valerio,
* MailPoet plugin worked just fine until the last update.
I have raised the problem
with my hosting provider and they explained that for security reasons they cannot
add any exceptions on their server, so I will be forced to use another newsletter
plugin 🙁 Search the forum, there are many users that experience the same issue.
* [Wysija](https://wordpress.org/support/users/wysija/)
* (@wysija)
* [10 years, 10 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6307009)
* Hi,
* Sorry to hear that, and we will definitely be investigating this in the future.
* Thanks,
The MailPoet Team
* [felix_ardeleanu](https://wordpress.org/support/users/felix_ardeleanu/)
* (@felix_ardeleanu)
* [10 years, 9 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6307090)
* Hi all,
My host has confirmed that the mod_security lists on their server are
up-to-date. Please investigate the problem. I am still getting this error:
* Request error not JSON:
403 Forbidden …………….. ……………..
* [felix_ardeleanu](https://wordpress.org/support/users/felix_ardeleanu/)
* (@felix_ardeleanu)
* [10 years, 9 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6307093)
* I would also want to mention that I have installed MailPoet on another WordPress
site, hosted by another provider and I encountered the same problem.
* [AndreQ](https://wordpress.org/support/users/andreq/)
* (@andreq)
* [10 years, 9 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6307094)
* I am also encountering this problem.
* [Wysija](https://wordpress.org/support/users/wysija/)
* (@wysija)
* [10 years, 9 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6307117)
* Try this: [https://support.mailpoet.com/error-403-on-admin-ajax-php/](https://support.mailpoet.com/error-403-on-admin-ajax-php/)
* [Sleepyday](https://wordpress.org/support/users/sleepyday/)
* (@sleepyday)
* [10 years, 9 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6307121)
* I am having similar issues to everyone else on this post. When I try to insert
a post, the dialogue box just hangs…..then when I try to send a test email I
get the following:
* Request error not JSON:<!DOCTYPE HTML PUBLIC “-//IETF//DTD HTML 2.0//EN”>
<html
><head> <title>403 Forbidden Forbidden
You
don’t have permission to access /wp-admin/admin-ajax.php on this server.
* Also, when trying to duplicate a newsletter I get 403 error message: Forbidden
* You don’t have permission to access /wp-admin/admin.php on this server.
* This has only recently happened and I need to send out a relatively urgent communication.
I’ve tried updating .htaccess according to the support suggestion in 14 but neither
option seems to work. I’d really appreciate a fix on this asap. Surely this must
also be affecting paid subscriptions as well?
* [Wysija](https://wordpress.org/support/users/wysija/)
* (@wysija)
* [10 years, 9 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/#post-6307126)
* [@sleepyday](https://wordpress.org/support/users/sleepyday/) Please get in touch
with your host’s support and report this to them, they might be able to find
the origin of this block on your admin-ajax.php
Viewing 15 replies - 1 through 15 (of 19 total)
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* 19 replies
* 6 participants
* Last reply from: [Wysija](https://wordpress.org/support/users/wysija/)
* Last activity: [10 years, 7 months ago](https://wordpress.org/support/topic/request-error-not-json-insert-post-not-loading/page/2/#post-6307159)
* Status: resolved