Been trying to access the online editor and it gets stuck on the loading screen every time.
Is the server down or is this a me issue?

Me too . I can play my games but not edit .tried re logging in . Tried creating test game same result.

Same here ... tested it in multiple browsers because other aspects of the server (like play a game) are still possbile. New games are also not working. In the debugger I see the following (if helpfull)

Uncaught TypeError: refreshTreeSelectElement is undefined
initialiseElementEditor https://quest2.textadventures.co.uk/Scripts/GameEdit.js?c=279741572:242
initialiseTree https://quest2.textadventures.co.uk/Edit/Game/340306:144
jQuery 10
initialiseTree https://quest2.textadventures.co.uk/Edit/Game/340306:142
jQuery 11
selectTreeNode https://quest2.textadventures.co.uk/Scripts/GameEdit.js?c=279741572:1223
initialiseTree https://quest2.textadventures.co.uk/Edit/Game/340306:152
jQuery 21
initialiseTree https://quest2.textadventures.co.uk/Edit/Game/340306:121