The error message may be related to specific licensing particularly for tenant-to-tenant migrations.
Please check whether your tenant has the relevant licensing. And do all pre-requisites given in this article.
Note: This feature is not supported for users of the Government Cloud, including GCC, Consumer, GCC High, or DoD.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.