Well, this is still a problem (second issue listed there):
https://forum.reallusion.com/FindPost556071.aspx
When MB 1.0 was still available, I managed items there, but now it’s decommissioned and many items cannot be edited while that network error pops up.
It seems to happen mostly on older items which are not part of packs.
Please fix it, or advise if some actions on my end is required.