My face id not working.but one moment .I updated after it's working .this is second time

Hi lakshan148,

Thanks for posting in Apple Support Communities.

We see that Face ID is disabled and you already checked out the resource titled If an alert says Face ID has been disabled on your iPhone or iPad Pro. This can be a hardware issue, but to address it, make sure you're updated to the latest software version for your iPhone model.

1. Update your iPhone or iPad to the latest version of iOS or iPadOS.

2. Check if there is an issue with Face ID in your iPhone's parts and service history. To do this, open the Settings app, tap General, then tap About.

3. If you still can't enroll your face or unlock your device with Face ID, you can take your device to an Apple Store or Apple Authorized Service Provider, or contact Apple Support about your iPhone or your iPad.

Regards.