Login Error Please help me.

I have had to re-install Mxo and when I try to log in it says

Log file opened...
31 Mar 01:03:34.421 [P 1896/T 452]: [CRITICAL] No available render modes were detected!31 Mar 01:03:34.421 [P 1896/T 452]: [MAJOR] WidgetManager was never Initialized!


Says that the "client.dll" file cannot be read properly and that no render modes were detected.

What do I do?

Sometimes just restarting the computer helps clear up that problem.