It says the market trades on Polygon and my wallet is on another network
まだ日本語では提供されていないため、原文で表示しています。上のメニューから翻訳できます。
The market only works on Polygon. Your wallet is currently showing another network. Accept the Switch network prompt, or change the network on the Wallet tab, and try again.
Switching only changes what the wallet shows and where it sends. Nothing moves between networks.