You may be randomly getting errors trying to do anything (including but not limited to viewing, editing or creating) on the wiki right now. Clearing your cookies may help. If you have any problems, please let any administrator (me or GrahamSH) know.
This issue should now be resolved. If you get errors like Error contacting the Parsoid/RESTBase server: (curl error: 52) Server returned nothing (no headers, no data) when trying to use the Visual Editor or DiscussionTools, clearing cookies should help.
Oh and for North Americans, Miraheze may be very slow. They are aware of and tracking this issue.