I Tried to add this to the VM Invoice Category, but its shows as locked?

I have used VM Invoice in my Joomla 2.5.28/VM2 site for a while now, but am just updating the site to Joomla3.4.x and VM3.

I have installed VM Invoice in the Joomla3/VM3 site & copied all settings, etc.

But when testing, all seems to work except the "Create new order". When I click on this I get a 500 error saying MooTools is not found; 500 JHtmlBehavior::mootools not found.

The majority of this site was migrated from the older J2.5.28 site , but Artio Invoice was not migrated and installed as new in the J3.4.x site.

Please can you help/advise on what may be the problem.

Hello,

unfortunately this forum category doesn´t serve for questions like this. We provide a newer form of support service - via Support tickets. Please, send us a Support ticket - it can be found in your Artio user account -> left panel -> Support