Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi kanchana,
Thanks for posting back with these details.
So if the OneDrive storage space is not full but still all of your plans are showing the error, and you have confirmed there has nothing beyond the Planner limits, then it is suggested to connect the admin/IT department in your organization and take the advantage of the support ticket and get further support from our escalated engineers.
See: Get support - Microsoft 365 admin | Microsoft Docs
The escalated engineers can collect the error logs from the background and further confirm the cause of the issue. Really sorry for the limited support resources for community engineers here.
Your understanding and patience are highly appreciated. Hope you a nice day!!
Best Regards,
Mia