This is the fee I paid for the transaction. 0.0007164 BTC ( 31.4 sat/byte )
Yes, I can replace my fee.
When I change the value, Electrum gives me a new one, like 41.1 sat/byte. I just confirm but nothing happens. Do I need to change the option to Mempool, Estimated Time (which is set as default) or Static?
The network is so congested now.
41.1 sat/vbyte would make your transaction about 12 MB from the tip and is not enough for a fast confirmation.
If you change the estimation method to mempool, electrum will estimate the fee based on the mempool size. For a fast confirmation, you need to set it to 1 MB from the tip. This should lead to about 150 sat/vbyte.