Some Playlists Fail to Play

I am running LMS 8.1.1 on a Windows 7 Pro desktop.

I have 38 playlists, all of which play correctly from the web remote control. Of the 38 playlists, there are 14 which fail to play on my three radios. (The menus are blank). Two are ethernet connected, the other is wirelessly connected.

I have attached a server log listing taken while trying to play all 38 on one radio, and a manual log of which playlist was played, showing the results.

For each playlist which fails, the following error is thrown:

"[yy-mm-dd hh:mm:ss.ssss] Slim::Control::XMLBrowser::_cliQuery_done (800) Requested item index 0 out of range: nnn..nnn". The last nnn..nnn varies, for example 390..886 or 190..447

I have recreated three of the non playing playlists from scratch and all three fail the same way but with different index ids (the last 6 digits in the error).
Anyone else had this problem and fixed it?

Thanks in advance for your help!

Logitech Media Server Status
Logitech Media Server Version: 8.1.1 - 1610364019 @ Thu Jan 14 06:14:13 WEST 2021
Hostname: LEIGH-DESKTOP
Server IP Address: 192.168.1.9
Server HTTP Port Number: 9000
Operating system: Windows 7 - EN - cp1252
Platform Architecture: 8664
Perl Version: 5.14.1 - MSWin32-x86-multi-thread
Audio::Scan: 1.02
IO::Socket::SSL: 2.068
Database Version: DBD::SQLite 1.58 (sqlite 3.22.0)
Total Players Recognized: 3

Attached Images