If I understand the issue correctly you are migrating a share from a source server to a destination server that also happens to the machine that you are connected to, correct?

You are driving the transfer from the UX and noticed that it failed. Now you want to find out why it failed and so you click on the button to check errors and that gives you the error that you pasted. Correct?

If you have an active repro can you please check if the Storage Migration Service is running on the destination server?

Please collect logs as per https://aka.ms/smslogs and send them to smsfeed@microsoft.com.