Okay,
If you're trying to access the Grid and are experiencing errors or find you can't log in there's a few simple things to try first.
Open the drop down list on the website and instead of going straight for 'Access Grid' select manage characters and access the grid from there.
There is a known delay after log on to allow everything to sync so you generally need to wait 5-10 minutes after logging on to be able to access the grid.
If neither of these solution works, log out then log back in rinse and repeat.