Hi i have a few encrypted bip38 private keys that i am able to sweep using breadwallet, however i know that my core wallet wont allow my to importprivkey in that format. but now when i go to bitaddress to decrypt it is saying that the privkey is not valid, anyone else experienced this or know how to sort it?
You are almost certainly either missing one or more characters when you enter it, or are typing one or more wrong characters (or both).