The Earth is not the center of the universe. Similarly, time-travel seems to be an idea still stuck in the Newtonian idea of absolute time. As SR demonstrated: There is no such thing.
“Einstein said, ‘Time has no independent existence apart from the order of events by which we measure it,’”
“Einstein said, ‘Time has no independent existence apart from the order of events by which we measure it,’”
https://phys.org/news/2011-04-scientists-spacetime-dimension...