Can't enable MinimServer on QNAP TS-109

[nickc]

Sad to report that this problem has recurred on returning home after a longish absence. I powered up the QNAP TS-109 on return and the following morning reinstalled my Raspberry Pi on the LAN in order to stream music, discovering at that point that MinimServer wasn't showing in the controller. Checking the QNAP I found the MinimServer icon was greyed out and each time I tried to enable it, it reverted to "Status: Disable". I've tried reinstalling it, following the instructions exactly, but it's made no difference this time. I have the same error message as before in the QNAP log: "MinimServer start error: Error: dl failure on line 864" The requisite versions of the NPTL and JRE_ARM packages are installed and enabled. The one difference this time is that I now have an old desktop pc on the network running MinimWatch, but this too is greyed out (its icon in the tray). Kindly advise how I should proceed in order to rectify this problem. Is it likely to recur every time I restart the QNAP following a power down?