Serv-U - Web Client Pro issue

Hi All,

I have an issue with the 'Web Client Pro' in Serv-U (v15.0.0).

When you log into the web browser, select 'Tools', and 'Enable Web Client Pro', the interface become pretty much un-usable. When clicking on anything the following error pops up:

I am running Serv-U v15, Java v7 (update 51).

Has anyone else received this error or know how to fix this?

Thanks