Board Thread:General Discussion/@comment-3511076-20150603200634/@comment--20150603204915

It is a known issue. Please report it to Special:Contact.

"We're currently looking into an account session issue that may cause edits or uploads to fail (with an error message like 'your session expired'). If you're being affected by this, please let us know any details via Special:Contact. Thanks!"

- Kirkburn - June 1, 2015 Technical Update