Release 0.110 is on the Development server for testing. Fully exit Skyrim, open the launcher and accept the 0.110.0 update, select Development, run Sync, then press Play. Launcher 0.109.0 still works while you update.
Steam now ships Skyrim 1.7, and Nineholds runs 1.6.1170. If your game updated, open Set up / Fix installation and choose Restore Skyrim. The launcher guides you through Steam's own downloads, checks every file before it changes anything, and keeps an Undo. It never runs on its own.
Setup checks now say which kind of Skyrim version you have, notice a game folder that cannot accept new files, and point out a missing Microsoft Visual C++ runtime. Downloads run in parallel, resume after an interruption and check disk space first. The GOG edition is recognised and named, though it is not supported yet.
Joining is steadier. Retry rejoins after a dropped connection when there is room, pressing Play while your place is still held keeps it, and a refused join now says why. Before a restart you see the countdown in chat.
When something goes wrong, Collect diagnostics saves one file you can attach in Discord, and Copy support report puts a short report with your Support id on the clipboard. Nothing is uploaded automatically.
This remains a closed-alpha test build. Report anything odd in the testing channel with your Support id.