You can try out the fixes in the latest version: -

We have today some bug fixes that have been affecting players for the past few days.

If you happen to run across any bugs, please report them either on Forum or through our Support Customer.

Here is a list of fixes:

Release Notes:
Bug Fixes:
Fixed an issue with the player not being able to access the game - Brown/Green screen.
Fixed an issue with incorrect damage being dealt when visit a friend.
Fixed an issue with the PvE fights giving a disconnect when visiting a friend.