Personal-account Copilot Tasks users will be migrated to Copilot Cowork over the next few weeks. Cowork is a Premium or Pro feature in Preview, so Personal and Family subscribers lose access to it and must upgrade to run or start tasks.
Before
Copilot Tasks available with a personal Copilot account
After
Cowork requires Microsoft 365 Premium or Pro
Action needed:
Upgrade to Microsoft 365 Premium or Pro to keep running tasks, and turn scheduled tasks back on in Cowork.