SDL Language Cloud Terminology (Beta): script errors when saving term pairs

Every time I add a new term pair to my online TB, I get the following error:

"Script error
An error has occurred in the script on this page.
Unable to set property 'onload' of undefined or null reference

languagecloud.sdl.com/.../ compact =terminologyproviderstudio&langTx=nl&ermTx=Emerg ency+Fix&ermTr=Emergency+Fix&iangTr=en"

I have to click it away twice, and then it seems to save fine.

 

Michael