Hi Stefan
In the previous instance, installing the latest download of the module resolved the issue. This down should available to you via yourJoomla51
Profile -> Extension Downloads. Also ensure that you have no overrides created for the module. If the issue persists, may I suggest sending temporary administration access to your Joomla installation to
[email protected] and we will examine this issue further. For our reference please paste a link to this post in your email.
Ciaran