( ! ) Notice: Undefined variable: children in D:\wamp\www\millis\modules\mod_k2_user\helper.php on line 94
Call Stack
# Time Memory Function Location
1 0.0007 379944 {main}( ) ..\index.php:0
2 0.6126 12125056 JSite->render( ) ..\index.php:49
3 0.6383 12329192 JDocumentHTML->render( ) ..\application.php:265
4 0.6383 12329304 JDocumentHTML->_renderTemplate( ) ..\html.php:397
5 0.7353 12882336 JDocumentHTML->getBuffer( ) ..\html.php:599
6 0.7354 12882976 JDocumentRendererModules->render( ) ..\html.php:339
7 0.7717 12946680 JDocumentRendererModule->render( ) ..\modules.php:37
8 0.7723 12949024 JModuleHelper::renderModule( ) ..\module.php:101
9 0.7789 13026968 require( 'D:\wamp\www\millis\modules\mod_k2_user\mod_k2_user.php' ) ..\helper.php:169
10 0.7938 13071688 modK2UserHelper::getMenu( ) ..\mod_k2_user.php:67

This shows after login and the login module does not show all items.

Looks like an incomplete translation file (se-SV) caused the login frame not to show up fully after login. Now when the language file is complete it looks ok again. Case closed!

I have the same problem that you said

Notice: Undefined variable: children in C:\wamp\www\Articles\modules\mod_k2_login\helper.php on line 94
Call Stack
# Time Memory Function Location
1 0.0011 383696 {main}( ) ..\index.php:0
2 0.4506 11902704 JSite->render( ) ..\index.php:49
3 0.4532 11912568 JDocumentHTML->render( ) ..\application.php:265
4 0.4532 11912568 JDocumentHTML->_renderTemplate( ) ..\html.php:397
5 0.4687 12173248 JDocumentHTML->getBuffer( ) ..\html.php:599
6 0.4687 12173624 JDocumentRendererModules->render( ) ..\html.php:339
7 0.4759 12184800 JDocumentRendererModule->render( ) ..\modules.php:37
8 0.4760 12186760 JModuleHelper::renderModule( ) ..\module.php:101
9 0.4797 12266696 require( 'C:\wamp\www\Articles\modules\mod_k2_login\mod_k2_login.php' ) ..\helper.php:169
10 0.4864 12332504 modK2LoginHelper::getMenu( ) ..\mod_k2_login.php:67

If your problem Solved please lead me how can i solve it
Thank you

What happens if you turn error reporting to "none"

if you mean that turn off the wamp Eror reporting off >> when I turn it off it works good :unsure: what 's going on an why it 's happening if there is an error so why Wamp mention it :pinch: :blink: ..Thanks for supporting

the joomla version is 2.5
the k2 version is the last version

Instead of changing wamp error reporting you can probably also go to joomla global settings and set error reporting to none. The message you are showing is a notice...if it was a error you would most likely get a blank page.
Ensure the module is functioning properly and leave the notices off

I have the same problem: