captcha is not showing

Status Code 200 here as well:
url: https://../wp-admin/admin-ajax.php?action=cforms2_reset_captcha&_wpnonce=6d6638919c&ts=&rnd=294826

Cache-Control no-cache, must-revalidate, max-age=0
Connection close
Content-Type image/png
Date Tue, 12 May 2015 12:24:19 GMT
Expires Wed, 11 Jan 1984 05:00:00 GMT
Pragma no-cache
Server Apache
Set-Cookie turing_string_=i%2B1827e63cb317b525dde45a3c4208caf3; expires=Tue, 12-May-2015 17:24:23 GMT; Max-Age=18000
; path=/
Transfer-Encoding chunked
X-Robots-Tag noindex
x-content-type-options nosniff
x-frame-options SAMEORIGIN

to be seen here: https://www.aktivurlaubsteiermark.at/aktivurlaubsteiermark/buchen/

Does removing
require ('js/include/textfield.php');
in cforms-captcha.php solve the problem?

In @jeckel1’s case the problem was (Did you change something? The captcha is shown now.) a linebreak before the PNG data, in @mfauster’s case there is a UTF8 Byte Order Mark before the PNG data. It may be the case that it has something to do with the above statement.

@bgermann: I did remove the line, no change

@mfauster I think you put the statement back at the wrong line.

This issue is not dependent on cforms. Any loaded PHP file can be the reason for this. So it can be any other installed plugin.
However with the following fix you can circumvent the problem: https://github.com/bgermann/cforms2/commit/cda8e7d84be99e82c46ae2a1a21e05efd9f220b9

I will include it in the next version, but you can patch it now if you cannot wait.

Ok, not sure how I fixed this but it is fixed. I installed the “cforms2 real simple captcha” plugin. That broke my site (white, blank screen). I went into my data base to manually deactivate all my plugins. Went back and reactivated everything in the wp admin section except the “cforms2 real simple captcha” plugin. So basicly the “cforms2 real simple captcha” plugin is installed but not activated. I’ll leave it as is because I don’t want anything to stop working again.

mfauster:

Maybe try deactivating your cform2 plugin and reactivate it to see if that fixes things. If not try deactivating all your plugins and then reactivate them. If that doesn’t work try to install the “cforms2 real simple captcha” plugin and leave it deactivated.

Thanks “jeckel1” – your writeup really helped me. Updating Cforms plugin plus adding the ‘Cforms 2 Real Simple Captcha’ plugin but leaving it deactivated fixed the problem with captcha images causing a http 500 error.

Many thanks –

Mitchell_T