Weird/Unexpected security message action

I have set up some user roles and made one role not able to create a business process. When i try to add a business process it does as expected and gives an error message like below. However when i click on the error message to get rid of it, it doesn't return to the screen i was previously on. Instead it is blank, as shown in the image below, and when i try to navigate to other pages they are also blank. Could anyone help resolve this?
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