My washing machine is showing 0 and a key when I try to select a wash

Nice to meet you, *****!
Can you, please, tell me the exact brand and model name of your device?

Thank you!
When the child lock is activated, there will be a key symbol in the display and all the washing machine buttons will be disabled.
To deactivate the child lock, press and hold the start button for three to five seconds. After this time you will hear an audible beep and the key symbol will disappear.