"Exception on selecting item in input type ComboBox"

[vernal atlas]

Do you confirm you have one led on a pin and a button on another pin? There is no hardware link between them?

Can you post a screenshot or the button and led config page?

[torn hill]

The combo box error is nothing to worry about. Please disregard.

Sebastian is aware and will get it fixed, but it has no impact on the operation.

[dark night]

Yes if you want to cross check my pcb https://u.easyeda.com/join?type=project&key=fbece2de4d9841cdbf6e49333f543dc1&inviter=2d979c5a0a80442f9dad26e65fe4c04a