I've also attached the mpl that was saved to desktop. In that it has JRiver as the location - I wonder if it's the first upload failure that's generated both the .mpl file and the glitch in the local library
Update: can't attach the mpl so will paste the text from the mpl for the first track - as you can see (bold text) the location is given in the mpl as the jriver server
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<MPL Version="2.0" Title="Chill Out" Group="Cloud" PathSeparator="\">
<Item>
<Field
Name="Filename">http://RadioJRiver:0QIhGt1d3gAkvr5NSNXKVO2lGXDg7ieo+DIEL6a2Y7Rau7c1lAlOJGpNFcvLbhdOe0xmrJgOWe3VPHQSHyu2K6fs5NjIjCQFF0cGSuXsPT9HIBl0IFap0nsR6o99GCFXbqheWbemZtuEgXjtSINH0U8rIcn1dhcCdFBZYEnGGu4StbpjGqkEFtoN3YCMr2LnD3v6slNLNuBaF2KYFm0COwIKwSsH+pGQmG8jYMKuSHf+CxZhm3fB3CLsdMziz8gUEyT64pZinRqam48kINBW2xEehb7qUfzOkxVsghPbB8Y=</Field><Field Name="Media Type">Audio</Field>
<Field Name="Name">Building Steam With a Grain of Salt</Field>
<Field Name="Artist">DJ Shadow</Field>
<Field Name="Album">Endtroducing..... (DE) (flac)</Field>
<Field Name="Genre">Trip-Hop</Field>
<Field Name="Comment">ExactAudioCopy v0.95b3</Field>
<Field Name="Date">35065</Field>
<Field Name="Bitrate">775</Field>
<Field Name="Image File">INTERNAL</Field>
<Field Name="Duration">401.3999999999999773</Field>
<Field Name="Track #">2</Field>
<Field Name="Bookmark">25518</Field>
<Field Name="Date Imported">1536958493</Field>
<Field Name="Last Played">1554133837</Field>
<Field Name="Number Plays">2</Field>
<Field Name="Skip Count">2</Field>
<Field Name="Last Skipped">1554136148</Field>
<Field Name="Date First Rated">1536958493</Field>
<Field Name="File Type">flac</Field>
<Field Name="File Size">39265050</Field>
<Field Name="Date Created">1536958085</Field>
<Field Name="Date Modified">1536958085</Field>
<Field Name="Date Tagged">1554136147</Field>
<Field Name="Date Last Opened">1554136120</Field>
<Field Name="Compression">FLAC</Field>
<Field Name="Peak Level (R128)">-0.0 dBTP; -0.0 Left; -0.0 Right</Field>
<Field Name="Peak Level (Sample)">-0.1 dB; -0.1 Left; -0.1 Right</Field>
<Field Name="BPM">82</Field>
<Field Name="Volume Level (R128)">-12.3851804733276367</Field>
<Field Name="Volume Level (ReplayGain)">-7.3851799964904785</Field>
<Field Name="Dynamic Range (R128)">9.1552696228027344</Field>
<Field Name="Dynamic Range (DR)">7</Field>
<Field Name="Sample Rate">44100</Field>
<Field Name="Channels">2</Field>
<Field Name="Bit Depth">16</Field>
<Field Name="Audio Analysis Info"><XMLPH version="1.0">
<Item Name="LastFailedDate"/>
<Item Name="Excluded"/>
</XMLPH></Field>
<Field Name="Total Tracks">13</Field>
<Field Name="Zone Last Opened">Player</Field>
</Item>
<Item>
<Field