Getting past Launch error

So I have the following paths set in in the Adobe Extension Builder 3 preferences:
CC paths ->
Service Manager root folder : /Library/Application Support/Adobe/CEP/extensions
User-specific Service manager root folder: /Users/richard/Library/Application Support/Adobe/CEP/extensions
Target Application: /Applications/Adobe Premiere Pro CC 2018/Adobe Premiere Pro CC 2018.app/Contents/MacOS/Adobe Premiere Pro CC
I am running Eclipse:Oxygen.2 Release (4.7.2)
macOS 10.13.3
I have run out of things to try. the paths seem correct. Is there some more configuration I need in order that i can follow this: Building and debugging HTML5 Extensions for Adobe Creative Cloud products - YouTube
Many thanks for your help
Richard
