Do you mean the pop-up message "Multiple Devices Can't Access This App at the Same Time"? If so, it's not caused by SKYBOX updates, it is due to Meta updates. You will also encounter this pop-up when you use other apps simultaneously with the same account on multiple devices.
If you'd like to ask for a refund, please contact Oculus Support directly for a refund. You can also follow this link to refund.
We, as software developers, cannot issue refund for users purchasing on Oculus platform.
Thank you for your understanding.