First question – is this only when you use quote or does this happen other times too?

So far I have only seen it when I click the quote button inside the topic.

Most odd. The line of code it points to is actually to do with localisation… could you help me. Could you try repeating the process and when the browser stop[s with the message could you look at the source of the page to see of there are any other messages that are not being displayed?

No problem – I did what you asked about source of the page. No other messages being displayed… just the same message (below)

Access denied - you do not have permission<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /problem-with-post-edit-buttonome/rtmconsu/public_html/wp-content/plugins/simple-press/sp-api/sp-api-primitives.php:59) in <b>/problem-with-post-edit-buttonome/rtmconsu/public_html/wp-includes/pluggable.php</b> on line <b>881</b><br />

This specific message – ‘Access denied – you do not have permission’ is a pretty standard message but is mainly used – and I stress mainly – for when someone tries to do something and they are not actually logged in to the WP account. The other main use is in the admin when someone is trying to perform a task they do not have the capability ro perform but that clearly is not the case here.

The questions of course are – why does it think you are logged out and why only when you perform a quote operation…?

let’s start with other WP plugins. What do you have active please?

Thanks for your help – are you talking about plugins to my SimplePress forum or plugins to my main website (which is a WP site as well)?

Yes- other WordPress plugins in the same way that Simple:Press is.And are any of them caching plugins?

OK I have 3 plugins on my WP site

1 – SimplePress Forum 5.1.3

2 – New User Approve 1.3.4 (because my forum is only for approved registrants)

3 – Swift Type Search

Sp 5.1.3…. ?

OK – best check then. Which SP editor are you using and which version of the Sp editor plugin is it please? By the way – all this data can be found at the forum admin > toolbox > environment panel.

Oh gosh. You took me by surprise. You don’t use an editor plugin…!
Needless to say I can’t replicate this and this is a unique report. Somehow we need to get hold of the output that is being attempted. I need to do some research to see if i can find an easy way that will allow you to set this up.

OK – thanks. As an administrator, I just tried to approve a forum users reply to a topic and got this error…

Fatal error: Call to undefined function sp_filter_email_content() in /problem-with-post-edit-buttonome/rtmconsu/public_html/wp-content/sp-resources/forum-plugins/subscriptions/library/sp-subscriptions-components.php on line 221

Some of my plugins have updates ready – and we haven’t updated them yet. Could this be causing the problems/these errors?

I would say yes in this case. Personally I would recommend bringing it all up to date – SP core and the plugins. There were a couple of security updates in there worth having. Let me know when done and if there is still the main problem.