I'm using the sj k2 slider for a site i'm working on. Front end looks and works fine. But when i go to the back end and go into the module i get the above error and it won't do anything or i can't make any changes. It's missing the formatting or something.
Error: Call to undefined method k2helperhtml::loadquery().

Any ideas appreciated.

Dear leschuler

This issue relate to update k2 2.8.0
Please go to /httpdocs/modules/mod_sj_k2_slider/mod_sj_k2_slider.xml and find:

<field name="item" type="item" default="" label="K2_ADD_ITEMS" description="K2_USE_THIS_TO_ADD_ITEMS_TO_THE_LIST_BELOW"/>
<field name="items" type="items" default="" label="K2_DRAG_AND_DROP_TO_REORDER_ITEMS" description="K2_DRAG_AND_DROP_TO_REORDER_ITEMS_CLICK_THE_REMOVE_ICON_TO_REMOVE_AN_ITEM_FROM_THE_LIST"/>

=> change to:

<field name="items" type="k2modalselector" default="" label="K2_ADD_ITEMS" description=""/>

thanks

I took out the the two lines and replaced with the one you put in answer. It gives me an error that says "500 error loading form file".

dear leschuler

Maybe you edited not right.
Please send us the ftp account to check directly?

thanks

Here's the FTP information

Dear leschuler

I installed the latest version for you, please check it and configure again

thanks