same for me and i have had several messages from other mappers today having the same issue .
i did notice i had a few attempts to get steam connected today for friends network.
but seems like aa and steam may not be communicating for auth . but only for editor.
Getting the error message as well if I try to get online. If I select OFFLINE I can start the editor.
Today I'm facing something in edition. Even if I start a nearly empty map, the editor is legging a lot - so you can't work. The only view that works is "brush wireframe " or "wireframe". All above stops me from working. yesterday - all was OK.
I had the same issue. If you let it time out then click work offline it works at least on my pc. I put a ticket second the game came back and editor wasn't working.
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i did notice i had a few attempts to get steam connected today for friends network.
but seems like aa and steam may not be communicating for auth . but only for editor.
Today I'm facing something in edition. Even if I start a nearly empty map, the editor is legging a lot - so you can't work. The only view that works is "brush wireframe " or "wireframe". All above stops me from working. yesterday - all was OK.
The DEV Team are aware of the issue, and are looking into it as best they can.
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You can still make maps in Offline mode and you should be able to upload/update your maps to SWS.
My Portfolio / Site