This is pretty common problem when using tor here on bitcointalk considering the forum uses cloudflare.
All you can do is try again and again, although you can wait for the tor users on what remedy they are using.
Topic: Cloudflare blocks creating new topic (Tor) - page 2. (Read 266 times)
The time out doesn't take long and my text is gone.
I tried 3 times, same result.
Edit: Cloudflare lets me post this.
Edit: I tried again: I can Preview, but can't create a topic on the Electrum board.
--Knight Hider
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