I can't swap, the bar says "Requesting transaction data" and I cannot select anything else. How can I fix this?

What this error means is that there was too much of a price difference and default slippage was too low. To fix this issue, you need to "Accept New Quote" from the transaction screen. This will update the pricing and allow you to complete the transaction.

If this option does not show for you, try logging out of the Magpie dApp and reconnecting.