Hello Chavi,
Thanks for your question.
For this, I will recommend going through the deployment logs to find out the root cause
az webapp log deployment list --name MyWebApp --resource-group MyResourceGroup
https://video2.skills-academy.com/en-us/cli/azure/webapp/log/deployment?view=azure-cli-latest
You can further restart the Web app, or redeploy the static app as an immediate fix, if you find nothing from the logs.
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola