User blog comment:DaNASCAT/Technical Update: October 3, 2016/@comment-28398720-20161006114222/@comment-126761-20161007184236

We made some changes in the past few hours that hopefully improved matters - please let us know via Special:Contact/bug if you're still running into problems.

Update: we're still aware of some problems that might affect making edits/posts. The team are continuing to look into it.