New Update 2017.2 Error

Hi, recently updated to the new account right. 

Almost every time I delete an activity from Time Billing - Prepare Time Billing For "Customer" I get an error saying Something Has Gone Wrong.

The error code is: MYOB.Huxley.UI.Framework.Exception.HuxleyUIException

Gives me a choice to close or restart MYOB. Neither fixes the error.

The way we bill customers and keep track of hourly rates relies heavily on activity slips and the error is annoying and adding extra unnessecary time (especially when you need to delete 20 or more activity slips).

How can I fix this? 

Thanks.