Migration Assistant Restarting at 60% on Version 1.1.1

I started the migration process on an ubuntu device. I was able to get to step 2, but after starting step 3, the migration wizard keeps restarting. This process has been going on for 3 days, restarting when it reaches about 60% of the migration process.

Since I don’t have the original system anymore, I don’t know what to do to re-establish the system.

Currently, the migration assistant is stuck on the ligin screen, but the old user I used to access it no longer works. What can be done?