Hello,
Coinbase has sent to many users that starting from 9 April 2023 that you are not able except to send funds using your Coinbase wallet.This could be very damaging especially if you are able using Coinbase for a long time ago and a lot of users got paid in Coinbase email or to Coinbase wallet.
Step 1:
Move all funds to another wallet, it could be Coinpayments, Binance, or Exodus, and try at least to have at least verified account on this platform to avoid any interruption of service because they will disable your account.
Step 2:
Change your information of payment:
If you have your Coinbase email link to get paid leave the platform if they only offer this method or try cash out to Faucet Pay or Exodus.
If you have linked the LTC address to Kucoin or Binance then you have to remove it to not faulty send funds to a disabled account.
Step 3:
Try to familiarize yourself. Not having a coin base account never prevents you from paying coin base merchant site as guest checkout.