Once there, you'll require the YBL-1 Office 2 Key to access the room, and it's an absolute pain to acquire! How to Get the YBL-1 Office 2 Key Unfortunately, it's one of the rarest key drops for YBL-1.

You require the YBL-1 Generator Key, which is a random drop you'll receive from killing enemies in and around YBL-1. It's tough to acquire, though not as bad as the YBL-1 Office 2 Key.