Option symbol not found

I was trying to close my USO option trades, but when I click on close next to the open trade, it says option symbol not found.

This is a vertical hedge, so its not that big of a deal, and I can just let the options expire which is what I now plan to do, and if I get assigned I will either kill the trade or work my way out of it.

However, I did want to bring it to your attention since it may be a bug.

It is possible a work around would be for me manually to enter the close like I did the open instead of clicking on the close button next to the trade.

I did not try it, and at this point like I said I am willingly to leave the trade alone.