You seem to have at least two problem identified by Zorro in the screen you've provided:

1. Your Oanda account number was not recognised. Make sure you are providing correct account number and trading password. I know nothing about Oanda, so cannot help you further with this issue;

2. You have no Bars because you have no history data. That may be a consequence of the first problem above and may change after you do connect.
However, it after connecting to your broker you still have "no bars generated", try selecting script "Download" from the Script drop box and watch the Info window for history data being fetched.