Thank you for the reply Jiaz.

No changes have been made to the proxy/connection settings, they are in their default state as I re-installed JD2

No file types/hosters have been disabled, the sidebar for LinkGrabber is in it's default state as I re-installed a fresh version of JD2

All links are failing to be initiated by LinkGrabber. When copying a link from say Mega or Google Drive JD2 displays an endless 'crawling' icon in the bottom right corner of the program in the shape of a clipboard. If I copy a second link a second icon apears, and so on. None of the links appear in the LinkGrabber tab.