Cannot connect my WD My Passport for Mac-com.apple.DiskManagement.disenter error 49244

since you are using a "for Mac" drive, are you using any of WD's preloaded software on the drive (or installed such software yourself) that supposedly makes the drive "Mac ready"? if yes, that could be the cause of your issue. when you use software from just about any manufacturer for their storage device you run the risk of that same software not being compatible with macOS updates / upgrades. it can cause the software to stop working. at best this will cause you a headache. at worst it can render your data inaccessible. it is always best to use disk utility to erase and format a drive before use to remove any preloaded software.

that is why I asked about their software. when you use such software, I can and often does stop working after a macOS update / upgrade.

since you are using such software, i think your options are somewhat limited. 

you may want to contact WD and see if there is an update for their software.

alternatively, if you have a backup you can revert your macOS to the version of macOS that the drive was working on and transfer your data to another storage device and then erase and format the WD device before putting it back into service.

I am not a fan of WD disks, having had two that failed in the past. You don't say how old the disk is, It sounds like it may be failing.