Trying to debug and see if the post from SteemThat.com is still working. This will be a good test as I can see if it will send my post right now from https://SteemThat.com.
What if it needs some markdown to fail?
What If The Regex Isn't Working Correctly?
I'm not sure why some can and some can't publish remotely from SteemThat.com. The error appears to be that the blockchain doesn't recognize the username when the user name has the @ sign starting it which should be stripped via regex. Of course some people have tried with a capital Letter to start their name also which regex should catch this also and correct it.
Maybe even more directions or adding a notification that the entry isn't valid and restrict the submission of the post until corrected would work. Let's test adding an image too just for good measure. This has been written in markdown from https://steemthat.com/publish-on-steemit/