Nft create porblem

How can fix problem

on what chain is that?
it looks like the gas price was not high enough from that error message

Polygon Mumbai is use

You can set higher gas manually if you still have this issue.

how can set higer gash

you get that error directly in browser console or metamask pops up first and then you get that error?

this is console how can fix

when a click console inpage.js:1

you could use console.log(JSON.stringify(variable_name)) where that object is displayed as error, I don’t know where

that error message in console says that user denied transaction signature

mainly i new create new nft easy way But I can not buy and sell , then give error

Did you find out what the error is exactly? Make sure when selling you’re using the right wallet that has ownership.