Did you get a message about a safety warp when you entered the base? If so you’re going to need to get back out of the base. If you’ve saved at least once and can’t just reset then then you’ll need to load a backup.
When you’re out of the base again, on patch 1.2.6, fly to Sonata City to trigger the safety warp there. This will cause the Infernal Base warp to not trigger. This will allow you to enter the base as normal.