Hello kirstie103,
Welcome to Apple Support Communities. We understand that Scribble is not working as expected on your Apple Watch. We are happy to help.
Apple has recently released an iOS update for the iPhone. If you haven’t done so, please use the steps here to update your iPhone: Update your iPhone, iPad, or iPod touch - Apple Support Apple has also recently released a watchOS update. If you haven’t done so, please use the steps here to update your Apple Watch: Update your Apple Watch - Apple Support
What language is your watch set to when you’re using Scribble?
Please try the steps here: If you can’t send or receive messages on your Apple Watch - Apple Support
Let us know the results.
Take care.