Form Builder in IDM 4.9 - does it require internet connection

Hi, 

after upgrading from IDM 4.8 to 4.9 I noticed that Form Builder is not showing javascript code when editing logic on a component.


That lead me to the debugger in Form Builder, where I see failing requests to cdn.form.io/ace/1.4.10/ace.js

Am I on the right track? If yes, can I make this Form Builder not require external resources? I cannot make this environment reach the internet.