USB needs power, connect “App’e USB” to a USB port on this Mac

Is this "App'e USB" by any chance an Apple USB SuperDrive (CD/DVD drive)?

That drive has a reputation for being picky about power. Your best chances of success with it are to plug it directly into one of your Mac's USB ports (either a USB-A port, or a USB-C port via an Apple USB-C to USB adapter).

Many products, including external disks and printers, etc. must either be directly plugged into the computer or connected via an externally powered hub. Does your hub have its own power? If so, you need to confirm that the power is working.

That says that the problem is associated with that one disk. I would again plug i directly into the computer to verify that it works there. If so, I would then ply it into the bridge but swap ports with something else that is now working on that port. This would confirm that the port used on the bridge is not the problem. Last, how old is the disk? Maybe it is failing. You should run Disk Utility to test the disk. If it reports a problem, sometimes D.U. must be rerun several times to get an ok final answer. If the disk was originally formatted using a maintenance app provided by its vendor, that often causes odd problems which clear up after being reformatted with Apple's Disk Utility.

Thank you, Mitch. I too just learned something from you - that adapters can have that effect. I would have assumed that they would be neutral. We learn from each other here. Well done.