Why is the red exclamation mark isn’t getting of my watch screen?

Hi,

try this

Press and hold the side button and Digital Crown down until you see apple logo then release all buttons: https://support.apple.com/en-gb/HT204776

if this does not work contact apple support :https://support.apple.com/en-gb/contact

Hello ~Take a look here:

If you see a red "!" on your Apple Watch

~Katana-San~