Firstly I realise there are threads for both CK Editor and Manufacturers Description, however I was unsure where to put this as I think it applies to both.

I installed both Manufacturers Description/About which is also using (an adjustment to the code in order to make it easier to write in HTML tags) CK Editor a while back on Zen Cart 1.5.3, then upgraded it to 1.5.4 and everything was fine. Since I upgraded to 1.5.5 it caused an issue and neither worked properly.

So I reworked the PHP code for manufacturers description/about and managed to get that to work again with a few minor adjustments, still it wasn't firing up CK Editor though. I then found CK Editor has since been upgraded for 1.5.5 so I re-installed that, called the editor and it worked. See screenshot.

My problem is that when update is clicked on CK Editor the page goes blank and nothing updates.

In the error logs I get this:

[02-Aug-2016 22:08:51 UTC] Request URI: /MYADMIN/manufacturers.php?page=1&mID=57&action=save, IP address: 00.00.00.000
#1 header() called at [/home/MYWEBSITE/public_html/MYADMIN/includes/functions/general.php:26]
#2 zen_redirect() called at [/home/MYWEBSITE/public_html/MYADMIN/manufacturers.php:87]

[02-Aug-2016 22:08:51 UTC] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/MYWEBSITE/public_html/MYADMIN/includes/ckeditor.php:22) in /home/MYWEBSITE/public_html/MYADMIN/includes/functions/general.php on line 26

I’ve had a look at both line numbers but am not sure what to change or if it is in these files at all.