No longer able to access http://wdmycloudmirror/

When I made this post back in October 2019, I was encountering an issue where the dashboard would be inaccessible unless I restarted the NAS. I believe that this has mostly been resolved as having been an issue with the drive having been 95% full with content as it was a Plex movie server. The other post that you are helping me with (which is a more recent issue, possibly related) is that when the CPU gets taxed, I can not access the device, which makes sense overall.

Is it likely that this is still a networking issue? Or one of hardware/computing power?