of course I will make a temp admin account so you can have all the access rights how can I give it you ?

You can sent it through the contact form: getk2.org/contact-us

Thank you.

ok I sent the details the link is www.kenaktools.gr/%CE%BD%CE%B5%CE%B1

thank you very much

Is there somewhere I can see the frontend editing popup? Where can I add an item to check on the error?

OK. The issue is with your template. If you take a look under
www.kenaktools.gr/%CE%BD%CE%B5%CE%B1/item/add?tmpl=component&template=system you will see that the form comes with no issue at all.
The only js that your template is loading extra in the popup are the following:

browser-engines.js
maximenuckmobile.js
jfbconnect.js?v=520

try to disable each of them and check again to narrow down the problem.

Thanks a lot I ll try to find it and post what I ve found here but at the form you said the new article is not saved if you try to add a test article and press save it just transfers you to the start page...

again thanks a lot

ok the comments problem cames from a plugin called memberhome which is a very usefull plugin to have multiple homepages for different user groups but its poorly written if somebody has the same problem then at plugins/system/memberhome/memberhome.php at the end

delete after $defaultMenu = $menu->getDefault();

and replace with

if(!$user->guest && ($activeMenu == $defaultMenu) && $app->getClientId() === 0 ) {

if(JRequest::getVar('option', '')=='com_k2')
{


}else{

$app->redirect(JRoute::_("index.php?Itemid=".$menuId,false));



}
}
return true;
}
}
?>

still struggling with edit article which is indeed my template problem....

also now that I corrected this part if I try to add an article from the link /item/add?tmpl=component&template=system I also get the msgbox 3 times but the article is saved...

and if I select for an editor none then the error doesnt appear but the k2 popup remains white I dont see any error nor the screen for editing or adding new item

and finally
maximenuckmobile.js checked not a problem

jfbconnect.js?v=520 checked not a problem

I have a rockettheme template based on gantry
when default gantry template is loaded then its ok with browser-engines.js loaded and everything works ok
but with my template on I have the problem so I assume its not javascript but I cannot find it the debug is not showing anything......