Hi
I have just downloaded the stable K2 v2.6.6, I am using Rockettheme template which supports K2, I imported all my Joomla items to K2, enabled the K2 plugins but now I cannot see my local host site in frontend ! Did I forget to do something or is there a bug ?

Hello sandyasl,

The latest stable version is currently 2.6.7 so you might need to update that.

If you are seeing a white page then it is a PHP error. You need to enable error reposting and set it to development from the global configuration. That way you can find out the nature of the issue.

Thank you for your answer, you are right, I did have a blank page, so I followed your instructions and enabled development in Global Configuration. Here is the error reporting that I got :

Notice: Use of undefined constant K2_JVERSION - assumed 'K2_JVERSION' in C:\wamp\www\Joomla_2.5.11-Stable-Full_Package_FR\plugins\system\k2\k2.php on line 32[/color][/b]

Call Stack
# Time Memory Function Location
1 0.0005 247808 {main}( ) ..\index.php:0
2 0.0413 2682968 JSite->initialise( ) ..\index.php:30
3 0.0675 4352104 JApplication->initialise( ) ..\application.php:117
4 0.1425 7430464 JApplication->triggerEvent( ) ..\application.php:258
5 0.1425 7430560 JDispatcher->trigger( ) ..\application.php:670
6 0.1473 7619552 JEvent->update( ) ..\dispatcher.php:161
7 0.1473 7620040 call_user_func_array ( ) ..\event.php:71
8 0.1473 7620072 PlgSystemJSNTPLFramework->onAfterInitialise( ) ..\event.php:71
9 0.1487 7696888 JSite->route( ) ..\jsntplframework.php:112
10 0.1487 7696952 JApplication->route( ) ..\application.php:136
11 0.1533 7881232 JApplication->triggerEvent( ) ..\application.php:285
12 0.1533 7881280 JDispatcher->trigger( ) ..\application.php:670
13 0.1578 7934152 JEvent->update( ) ..\dispatcher.php:161
14 0.1578 7934640 call_user_func_array ( ) ..\event.php:71
15 0.1578 7934672 plgSystemK2->onAfterRoute( ) ..\event.php:71

( ! ) Fatal error: Class 'K2HelperHTML' not found in C:\wamp\www\Joomla_2.5.11-Stable-Full_Package_FR\plugins\system\k2\k2.php on line 55
Call Stack
# Time Memory Function Location
1 0.0005 247808 {main}( ) ..\index.php:0
2 0.0413 2682968 JSite->initialise( ) ..\index.php:30
3 0.0675 4352104 JApplication->initialise( ) ..\application.php:117
4 0.1425 7430464 JApplication->triggerEvent( ) ..\application.php:258
5 0.1425 7430560 JDispatcher->trigger( ) ..\application.php:670
6 0.1473 7619552 JEvent->update( ) ..\dispatcher.php:161
7 0.1473 7620040 call_user_func_array ( ) ..\event.php:71
8 0.1473 7620072 PlgSystemJSNTPLFramework->onAfterInitialise( ) ..\event.php:71
9 0.1487 7696888 JSite->route( ) ..\jsntplframework.php:112
10 0.1487 7696952 JApplication->route( ) ..\application.php:136
11 0.1533 7881232 JApplication->triggerEvent( ) ..\application.php:285
12 0.1533 7881280 JDispatcher->trigger( ) ..\application.php:670
13 0.1578 7934152 JEvent->update( ) ..\dispatcher.php:161
14 0.1578 7934640 call_user_func_array ( ) ..\event.php:71
15 0.1578 7934672 plgSystemK2->onAfterRoute( ) ..\event.php:71

When I disable K2, I can get back to my site. Please tell me what I have to do. Thank you.

You have to update Joomla! 2.5.11 ASAP since 2.5.14 is a security release. Also update K2 to the latest version.

You can also look for an update to the quickstart package as well, I think updating will solve the issue but since it is impossible to access your site or know the conf of the quickstart package you should ask RT for assistance as well.