my phone will not charge unless plugged into computer.

What brand of charger are you trying to use? Make sure your charger is an authentic Apple one or a third party charger that is certified as MFI (made for iPhone). If you are using a certified charger already it probably means the charger is defective and should be replaced.

What do you mean that it makes an error noise? Do you have another power blocks to try? I assume you have tried other wall outlets.

My iPhone 6s just started doing this yesterday. If I'm plugged into any wall outlet, it actually loses charge. These are actual Apple plugs too. if I charge via computer or even in my car outlet everything is fine. I updated to IOS 14.0.1 5 days ago.