I have also this problem...can i resolve it????
Pleaaaaaaase help meeee :S

laviniu wrote: enable proc is not the solution for must of us, because we are on shares host, and the provider wont enable it...another solutions?

I have the same problem, even i read your statement, i tried to chat with my serverhost. She just want to see the error inside my admin panel, created an administrator for her, and she needs like 7 minutes, then she says:..

ok, try now...

and suddenly i can open the MEDIA MANAGER succesfully.

I love my web host !

Luciano wrote: Hello, a big THANKS to all JW crew, you guys rocks! :lol:

Yes, same issue here. :huh:

"Invalid backend response. Data is not JSON."

Fresh Joomla 1.7.2 + K2 2.5.1 setup!

KingHost Shared plan specs:

Web Server Apache/2.2.15
PHP version 5.2.17
MySQL version 5.1.56
GD image library bundled (2.0.34 compatible)
Multibyte string support Enabled
Upload limit 100M
Memory limit 128M
Open remote files (allow url fopen) Yes

Browsers:
FireFox 7.0.1
IE 8.0.6001.18702

Luciano, tambem sou cliente da KH e estou com o mesmo problema. Entrei em contato com eles para cerificar a possibilidade de habilitar o processo proc_open do php, que é o problema. Porem eles nao liberam mesmo.
Mas para nós, eles tem uma outra alternativa, a migração para um servidor que eles chamam de Nginx, o qual dizem ser muito mais leve e rápido e também mais seguro, assim tendo habilitado o proc_open. Abaixo está a resposta deles ao meu tiket.
Achou alguma outra solução?

Abraço.

Olá Luiz,

Se for o proc_open, não é possível utiliza-lo em servidor Apache por questões de segurança. Sendo assim, permanecerá desabilitado.

No servidor Web NginX, tem o mesmo habilitado, devido a ser um ambiente mais seguro.

Podemos efetuar a migração para o Nginx, porém peço que faça a leitura dessa documentação antes, para ter ciência do que funciona e não funciona neste servidor web.

Como o próprio nome já diz é um servidor web light, extremamente rápido, poderoso e estável.

A sua configuração foi especialmente otimizada pelos engenheiros da KingHost, extraindo o máximo de performance, garantindo assim um rápido processamento para seu site.

Serviços Disponíveis

Recursos que demandam consumo de processamento e memória que são carregados no servidor apache, não estão disponíveis propositalmente para obter melhor desempenho no nginx. Por este motivo alguns serviços só são possíveis através do servidor apache e que não estão disponíveis para nginx, são eles » Serviço SSL Compartilhado » Java » Django » Ruby on Rails » Python Mod Rewrite URLs Amigáveis

Outra característica do nginx é que a configuração do mod rewrite, que possibilita utilização de urls amigáveis, deve ser feita diretamente no arquivo de configuração principal do servidor, não possibilitando a configuração através do .htaccess.
Nossa equipe de desenvolvimento produziu um exclusivo sistema que possibilita a configuração das suas regras de rewrite através do painel de controle, simplificando a sua migração para nginx.

This is a serious bug. Please K2 developers, fix this problem in next release.

here is my appeal on behalf of all users. greetings.

:( Aye this is a wee bit of a bummer... so much so that it is keeping me in Joomla 1.5.
Cuz Joomla without K2 just is not an option.

Same problem here
my hosting doesn't let to use "proc_open()"
(for security reasons I suppose)

same issue here


Error
Invalid backend response.
Data is not JSON.

Nearly 2000 views...this issue is clearly one that needs attending. Im sure it must be difficult to deal with for some developers out there.

This problem is curious to me, since I have a similar issue but its in the k2 front end only for me and it is only happening with the Joomla Image button and not the k2 image tab. But strangely the front end editing of a joomla article has no problems.

Im using latest 1.7 joomla and k2. Everything works fine except that front end Joomla button. I get the error, "You are not authorized to view" when I click the button.

If anyone can point me in the direction of a possible solution, I will gladly send you some of my excessive christmas candy!

I am also having this issue with my site, its kind of a major bummer as it breaks alot of the functionality of K2, I am using K2 2.5.4 and Joomla 2.5.1
I have spoken to my host, but they cannot enable the items mentioned in previous posts, due to it being a shared service.

if someone from JW/K2 could give us an update on this issue and whether there is as fix or workaround available or in the pipeline, as otherwise I will end up having to go elsewhere (which I don't really want to do as K2 is otherwise great)

If joomla admin details are required I can provide.

Thank you in advance for your help.

Jack



Database Version 5.0.77-log
Database Collation utf8_general_ci
PHP Version 5.2.17
Web Server Apache
WebServer to PHP Interface apache2handler
Joomla! Version Joomla! 2.5.1 Stable [ Ember ] 2-Feb-2012 14:00 GMT
Joomla! Platform Version Joomla Platform 11.4.0 Stable [ Brian Kernighan ] 03-Jan-2012 00:00 GMT
User Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0) Gecko/20100101 Firefox/10.0

---

Safe Mode Off
Open basedir /var/www/vhosts/jsacre.com/httpdocs:/tmp
Display Errors On
Short Open Tags On
File Uploads On
Magic Quotes Off
Register Globals Off
Output Buffering On
Session Save Path /tmp
Session Auto Start 0
XML Enabled Yes
Zlib Enabled Yes
Native ZIP Enabled Yes
Disabled Functions , dl , passthru , pcntl_exec , pfsockopen , posix_kill , posix_mkfifo , posix_setuid , proc_close , proc_open , proc_terminate , system , leak , posix_setpgid , posix_setsid , proc_get_status , proc_nice , show_source
Mbstring Enabled Yes
Iconv Available Yes

Oi Fernando agradeço a sua resposta, surgiram algumas dúvidas aqui sobre o NginX, agradeço se você puder respondê-las baseado em sua própria experiência

1- Migrar para o NginX da DH resolveu o seu problema com o Media Manager do K2?
2- Você conseguiu usar URLs amigáveis em sua instalação Joomla rodando no NginX?
3- Você percebeu alguma melhora considerável na velocidade de carregamento do site em relação ao APACHE?

Aqui no Blog do getk2.org foi divulgado que uma nova versão do K2 (2.5.5) está para sair ainda em Fevereiro, e conforme o post o Media Manager foi remodelado, espero que o problema "Invalid backend response. Data is not JSON" tenha sido resolvido, independentemente disto fiquei curioso sobre a performance do Joomla rodando no NginX, porém não posso abrir mão de URLs amigáveis, se isto for complicado de resolver prefiro manter-me no Apache.

Agradeço mais uma vez.

Luciano B.

This thread is old, but I found the solution. I upgraded to version 2.5.5 i is resolved. To update, simply download the latest version of K2 and install the extensions manager. (preserves the posts but delete the css).

I hope it helps someone!

Jordi thank you very, you have made my day! Whoohoo No excuse now for not updating... a world of work...drat, blessings are always mixed.

i have same issue i m waiting some one reponse aswell

SAME ISSUE HERE!

Invalid backend response.
Data is not JSON.

The latest K2 version 2.5.7.

Is this been solved? Please, any advice?

Hello

Invalid backend response.
Data is not JSON.

The latest K2 version 2.5.7.

Is this been solved? Please, any advice?


Help, Help.

:angry:
SAME PROBLEM

there is no answer? :blink:


1. seeing Blank page after upload image
and
2. seeing same error "Invalid backend response. Data is not JSON." when need to load image frome "browse server"

Hi. To anyone facing this issue:

The K2 media manager is working with JSON requests. So if anything other than JSON comes into the server response it will break it. Usually this happens for two reasons. The first one is that there is en error on the page. To handle this you can try setting error reporting to "None" under Joomla! configuration. If that doesn't solve ypur issue, then probably there is some other extension that it's spitting some output breaking the JSON. These extensions that are being executed on every page are System Plugins. So trying to disable some of them may also solve the issue. An example of an extension that is breaking the requests by spitting HTML code in EVERY page is the JomSocial.

imagine! i post 17 items with K2 and its image upload and its works good, but few days later without any change in my setting i wanna to send a new item and i watch this **** blank screen. :blink: :pinch:

plz helpppppppp :(

@mehrdad

A blank screen indicates a PHP error. Enable the error reporting under Joomla! configuration to see what's the error.