VirtueMart TP Featured Products Slider

[Henk-Jan]

I get the next message:
Notice: Undefined variable: multi_cats in D:\wamp\www\modules\mod_virtuemart_tp_vmfeaturedslider\mod_virtuemart_tp_vmfeaturedslider.php on line 129

Can somebody help me.
I have attached a jpg of the module in the  backend
Frontend you can see at www.hockeypaleis.nl

Please can you help me

Thanks

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