Liber Usualis files are not appearing in Neon

[JoyfulGen]

There are two sets of Liber Usualis mei files: one set that is in MEI 3, and one that's been converted to MEI 5.

If I upload an MEI 3 file to Neon, the mei version display says MEI Version: 2011-05 -- MEI Status: Unknown MEI Version and Neon alerts the user that it "Removed invalid zones contained in this file," but the image and SVG glyphs never generate.

If I upload an MEI 5 file to Neon, however, absolutely nothing happens. The MEI Version and MEI Status both say "Unknown." I had a look at the MEI file and it looks quite different from what I'm used to seeing. The header looks like this:

<?xml version="1.0" encoding="utf-8"?>
<mei:mei xmlns:mei="http://www.music-encoding.org/ns/mei">
  <mei:meiHead xml:id="m-cfc39488-a476-45ba-9f75-20b21f7d53cf">
    <mei:fileDesc xml:id="m-53d7ceb7-98de-4070-9c38-364f0f630289">
      <mei:titleStmt xml:id="m-1baa658d-16eb-4458-b2e5-252a1a228437">
        <mei:title xml:id="m-43b0fe70-b889-4232-913e-a7bc6f811488"/>
      </mei:titleStmt>
      <mei:pubStmt xml:id="m-8c194a2d-65c2-42aa-8f5b-c2ff88676067"/>
    </mei:fileDesc>
  </mei:meiHead>
  <mei:music xml:id="m-619b4397-a8df-4ec6-8d66-d9630eabc0ca">

That mei: tag appears at the beginning of many lines throughout the file.

I think maybe there are two issues happening here: for the MEI 3 file, maybe it's just the version that's the problem, but for the MEI 5 file, something weird is going on with the file itself. @yinanazhou we would be grateful for your wisdom!

This zip contains an image and its corresponding MEI file in both MEI 3 and MEI 5: Liber 786 sample.zip

@CThierrin, let me know if I've forgotten anything or misunderstood anything important.

[JoyfulGen]

Update! Cole has updated the mei 5 files; the pass the mei schema and now they react the same as the mei 3 files on Neon. Neon acknowledges that the file is there, but it can't figure out what version the file is.

Here's the updated mei 5 file:

0786_corr - mei5 updated.mei.zip