I created the tag
proxybroker on Stack Overflow and then tried to add the excerpt and description, but I got:
An error occurred submitting the post
while trying to
I also tried removing the description, but it isn't working either.
Looks like the suggested edit queue was full at the time and we do a real bad job of showing a coherent error message in that case.
I'll make myself a note to look into this more when I have time, but for now, the queue numbers look good at the moment, so if you try again, it should go through.