Cannot read Minimserver music library

[Peter@57m]

Not sure I can help you but I have been having a similar issue.

I noticed last week, on Lumin 1.2.4, that it was showing (offline) next to the number of albums/artists. Also the artwork was a bit suspect. So I decided to reload the library.
Big mistake. I then had the same symptoms as you. Searching, Analysing and for an instant Initialising. But never successfully loaded any music. Also was having an issue with Kinsky seeing MinimServer and sometimes Twonky on the QNAP. Not sure how long this had been happening as I mostly used Lumin. Sometimes when you start Kinsky one or other is there, sometimes both, sometimes neither.
I was trying to think what I could have changed and realized I had upgraded my QNAP 459 to 4.0.2. So set it back to 3.8.3 but no luck, same issue with Lumin, Kinsky etc.
Unistalled Lumin and Kinsky on the iPad and re-installed but still happening. Also noticed windows Kinsky sometimes didn't pick up MinimServer on starting.
Went to an old version of Lumin I had on an iPad backup (1.2.2) no luck there.
So just kept on using Kinsky on the iPad doing frequent restarts when MinimServer disappeared.
Lumin 1.2.5 came out, so upgraded and tried it. Did a quick search, analyse and then started loading but stopped after 50 or so albums (out of 650). Tried reload - no luck. Tried uninstalling Lumin and reinstalling, this time loaded 150 albums and then hung. uninstalled and reinstalled and this time it loaded all 650.
Had to stop Lumin and restart a few times to get it to load all the artwork but eventually got there.

Now it sometimes shows the server as (offline) but it still lets you browse and select and add items to the queue. After a few minutes the offline diappears, sometimes it returns.
So seem to be something odd going on with either QNAP or my network. Not having any problems playing music and doing anything else, surfing, email etc.
So I have not found the cause.
All I can suggest it to try uninstalling Lumin and reinstalling it and persevere. Hopefully you'll get lucky and have it load.

Using iPad, KlimaxDSM, Windows PC, WRT610N Linksys wireless router, GS108 Netgear 8 port switch, QNAP 459Pro+