Error codes read as follows;
An untrapped error occurred: NO_CLASS
One sample of the error code as pictured below.
These issues will be and have been brought to the sites Technicians and Representative so hopefully they can rectify the problem quickly.
If when attempting to reply to an existing thread, when you post up your comment, you may experience the pop up box showing up with the error code. Simply close the box by clicking on the X and your post will upload in the background either automatically or by hitting your refresh button.
This will aid in eliminating your post duplicating itself.
Thanks for your patience.