This article explains what to do if a runtime error from Internet Explorer browser occurs asking if you want to debug.
Problem:
When trying to connect to the Enterprise Server at localhost:86, the following Internet Explorer browser erorr occured:
A runtime error has occured do you wish to debug?
Resolution:
Go into Explorer, Tools, Internet options, Advanced. Then go down to 'Browsing' and check 'Disable Script Debugging' on.