Your post title indicates you are “Unable to connect to mybooklive” yet your post indicates a My Cloud device. which is it, My Cloud or My Book Live?
If you have a My Book Live you may want to visit the dedicated subforum for that device and see if there are any solutions in there.
https://community.wd.com/c/personal-cloud-storage/my-book-live
If you really have a My Cloud device then start with the following thread that lists a variety of steps to take with Windows 10 that experience My Cloud issues.
https://community.wd.com/t/compilation-of-windows-10-methods-steps-and-solutions/142576
