What the message means
'Off quotes' appears when the platform cannot execute your order at the price you asked for, because the current price the broker is willing to trade at has moved away from the one shown on your screen. In plain terms, the price you clicked is no longer valid, so the order is rejected rather than filled at a random level.
It is not a bug in most cases. It is the platform refusing to guess. MetaTrader would rather return 'Off quotes' than fill you at a price you did not agree to.
Common causes
Fast-moving markets are the usual reason. Around major news releases, at the market open, or during thin liquidity, prices jump so quickly that the quote on your screen is already stale by the time you click.
A weak or laggy internet connection can also do it: your quotes update slowly, so what you see is behind the real market. A market that is closed or nearly closed (for example just before the weekend) can produce it too, as can a broker with no live pricing for that symbol at that moment.
Step-by-step fix
First, check the connection indicator in the bottom-right corner of MetaTrader. If it shows red or a low number, your data feed is the problem — fix your internet or reconnect.
Try again a moment later so a fresh quote loads. If you use the order window, increase the 'Deviation' (maximum price slippage) setting so the platform is allowed to fill you within a small range rather than demanding the exact price. On MT5, enabling 'Market Execution' rather than 'Instant Execution' often removes the error entirely.
If it keeps happening on one symbol only, that symbol may be closed or restricted — check its trading hours in the Market Watch specification.
How to prevent it
Avoid clicking market orders in the first seconds of a big news event. Use pending orders if you want a specific price, and allow a sensible deviation so normal price movement does not reject you.
Keep a stable connection and, if you trade actively, consider a VPS close to your broker's server so quotes stay fresh.
Broker's fault or yours?
Usually it is neither party being unfair — it is genuine price movement. But if you see constant 'Off quotes' in calm markets on a normal connection, that can point to a broker with poor pricing or one that is slow to fill. Test the same trade at a quiet time; if it still fails, raise it with support and consider whether the broker is fit for the way you trade.