When I click on the "Product" tab, the page is totally blank.
I'm using the "WAMP Server" on my computer to run Wordpress.

Please help.
Thanks.

Dear Soteres,

Could you please enable error reporting and check for PHP errors on that page?
Thank you.

( ! ) Notice: Undefined variable: callback in G:\wamp\www\helpmetek\wp-content\plugins\wp-catalogue\index.php on line 22
Call Stack
# Time Memory Function Location
1 0.0009 311280 {main}( ) ..\admin.php:0
2 0.0012 329432 require_once( 'G:\wamp\www\helpmetek\wp-load.php' ) ..\admin.php:31
3 0.0016 340368 require_once( 'G:\wamp\www\helpmetek\wp-config.php' ) ..\wp-load.php:37
4 0.0022 439496 require_once( 'G:\wamp\www\helpmetek\wp-settings.php' ) ..\wp-config.php:80
5 0.4485 63672896 include_once( 'G:\wamp\www\helpmetek\wp-content\plugins\wp-catalogue\index.php' ) ..\wp-settings.php:215

( ! ) Notice: Use of undefined constant WPCACHEHOME - assumed 'WPCACHEHOME' in G:\wamp\www\helpmetek\wp-content\plugins\wp-catalogue\index.php on line 160
Call Stack
# Time Memory Function Location
1 0.0009 311280 {main}( ) ..\admin.php:0
2 0.0012 329432 require_once( 'G:\wamp\www\helpmetek\wp-load.php' ) ..\admin.php:31
3 0.0016 340368 require_once( 'G:\wamp\www\helpmetek\wp-config.php' ) ..\wp-load.php:37
4 0.0022 439496 require_once( 'G:\wamp\www\helpmetek\wp-settings.php' ) ..\wp-config.php:80
5 0.4485 63672896 include_once( 'G:\wamp\www\helpmetek\wp-content\plugins\wp-catalogue\index.php' ) ..\wp-settings.php:215

Dear Soteres,

Sounds like this plugin is not our Spider Catalog. There are no similar files in it, and also the main directory is plugins/catalog and not plugins/wp-catalogue. So the warnings and notices are coming from your other catalog plugin, which is WP Catalogue.

Could you please contact their support team and ask them to take a look?
Thank you.