I See an 'Insufficient Allowance' Error

This error usually means your Polymarket account needs a one-time approval it has not given yet. Polymarket's current exchange needs its own approval, separate from any approval you granted its earlier version. Granting it takes a minute on polymarket.com, and after that trading works everywhere, including through Polycopy.

An approval, sometimes called an allowance, is permission you grant on Polymarket for its exchange to move an asset when your orders fill. Polycopy never holds your funds, so the approval sits between your wallet and Polymarket. That is why the fix happens on polymarket.com rather than inside Polycopy.

This is the part that confuses people who have already approved once. On a BUY, the approval is for pUSD — permission to spend your cash. On a SELL, it is for the outcome shares themselves, a separate approval on Polymarket's conditional-token contract. So an account that buys perfectly well can still fail to sell with the same error text, and it is not a funding problem: the shares are there, the exchange just has no permission to move them.

Polymarket has run more than one version of its exchange, and each version needs its own approval. If you approved a long time ago, that approval likely covers the old exchange, not the current one. Your funds are fine. The current exchange just has no permission to trade them yet.