Hi everyall, i'm sorry but i dont speack english verry well (i'm french)

I come because i ave problème with my site. When i whant click on tag in k2 content, a message come with error 1064. This is the message :

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 SQL=SELECT * FROM #__k2_categories WHERE id=

Can you help me ?
Thank's.

ps: exemple of problème
tag on the bottom of content :
www.actugame.net/actu-jeux-video/1019-final-fantasy-xv-les-details-du-patch-day-one

résult after clicking :
www.actugame.net/actu-jeux-video/tag/PS4

Hello,

The page is working with the default template -> www.actugame.net/actu-jeux-video/tag/PS4?template=protostar

This means that this is most probably a template issue or a module (K2 related) which is present on tags views creates this issue.

Allright, but how can i fix this ?

Deactivate all modules until you find which one causes the issue, and contact the module's developer.
If it's the template you need to contact the template's developer.