Please Help: Classical Extras reference file

I have set the path to my own composer list. The following error message is displayed:

“8. No composer reference file. Check log for error messages re path name.”

The protokoll:

E: 11:32:01,091 C:\Users\Manfred Rößmann\AppData\Local\MusicBrainz\Picard\plugins\classical_extras.zip\classical_extras_init_.write_log:258: Classical Extras: No composer roster found

E: 11:32:01,091 C:\Users\Manfred Rößmann\AppData\Local\MusicBrainz\Picard\plugins\classical_extras.zip\classical_extras_init_.write_log:258: Classical Extras: No period map found

E: 11:32:01,091 C:\Users\Manfred Rößmann\AppData\Local\MusicBrainz\Picard\plugins\classical_extras.zip\classical_extras_init_.write_log:258: Classical Extras: No classical genre list found

My path: D:\MusikDaten\MuSo2\ShareFolder\database
My file: composers.xml
Example of entries:

<composer>
    <Name>Obo ADDY</Name>
    <Sort>ADDY Obo</Sort>
    <Birth>1936</Birth>
    <Death></Death>
    <CountryCode>AUT</CountryCode>
  </composer>
  <composer>
    <Name>Alban BERG</Name>
    <Sort>BERG Alban</Sort>
    <Birth>1885</Birth>
    <Death>1935</Death>
    <CountryCode>AUT</CountryCode>
  </composer>

Solved!
Obviously both Picard and MUSO have delicate souls.
If the composer has been entered in MUSO, Picard must be restarted so that he can find him.
It is possible that entering a new composer via the (hidden) input fields in MUSO is not sufficient, as the Core field in the reference file is set to ‘false’. But I haven’t checked that any further. Possibly open the reference file and change: true