If you work with #AzureFunctions that are deployed using #Devops Pipelines or #GithubActions, be aware that the function reads its data from a zip file that is deployed onto the associated storage account, and access to that zip file is controlled by a SAS token, and that token has an expiry date.
Today I've been caught out by this because a Functions app that I wrote in 2022 has been working tirelessly well since then, and hasn't required updating, and suddenly the runtime couldn't load the code to execute, because the SAS token had expired, and the service stopped working.
Redeploying the app solved the problem. I've just run through all my pipelines that were last deployed in 2022 and redeployed them to ensure they have a fresh token.
Check your old pipelines, see if you need to run a redeployment today.