Please note: We are aware of an issue affecting replies on the Arm Community forums, which may not be loading as expected.
We apologize for any inconvenience and appreciate your patience while we investigate and work to resolve the issue.
Thank you for your understanding.
This is addressed in parallel thread below, but for completeness, this particular issue is caused by using an evaluation license, but not selecting the evaluation edition from Help > License Manager
https://community.arm.com/support-forums/f/armds-forum/52265/i-use-the-free-for-the-30-days-s-licence-ds2021-2-but-when-try-to-connect-fvp-for-debug-encounted-below-error