I can't place option orders right now, the orders will appear in live but doesn't transmit, it happened once before, cost me $2K.
You were trying to place the order before the market opened. On your order presets is a box that says, "Allow trades outside RTH." Your box may not be checked. As well, a long-standing glitch in TWS denies outside-RTH trades from transmission unless the entire Presets page is deleted and re-written. Do what you need to do.
I was trading es options, no need to specify RTH. It lasted 15 minutes, it would have been a winning trade, I would have finished my trading for today. Later I placed a less than ideal order, now I'm considering to cut my loss. I'm angry.