[ethjs-query] while formatting outputs from RPC ‘{“value”:{“code”:-32000,”message”:”replacement transaction underpriced”}}’

[Maryam]

@user2170

I did that and it helped to remove the pending transaction, but still getting the same error when I try to swap tokens.

Changing the Polygon network RPC may help you. You can do it via chainlist. Remove the 2 spaces I inserted in the link.
https:// chainlist. org/
Click the arrow below the the Polygon network box on Chainlist. There you can find a list of RPCs. Choose one at the top of the list and add it to your MetaMask wallet.
The following article is related.

How to add a custom network RPC

@user2170

Should I do that or we could try to fix it here

Please do what I have suggested above. Let me know how it goes.