There is an error when importing imscc when a backup file contains an & in its name.
This character is not escaped correctly to & amp; (without space)

Debut info :
Error code:
Fatal Error in [backuptempdir]/d3a1f4e2ab6936a07fc4def38ee9667d/moodle.xml: xmlParseEntityRef: no name at line 76810

$a contents:
line 118 of /backup/converter/imscc11/lib.php: imscc11_convert_exception thrown
line 129 of /backup/converter/convertlib.php: call to imscc11_converter->execute()
line 206 of /backup/util/helper/convert_helper.class.php: call to base_converter->convert()
line 500 of /backup/controller/restore_controller.class.php: call to convert_helper::to_moodle2_format()
line 100 of /backup/restore.php: call to restore_controller->convert()

This is the file in error 

<MOD>
<ID>54</ID>
<MODTYPE>resource</MODTYPE>
<NAME>Sujet et Corrigé Mai 2018</NAME>
<TYPE>file</TYPE>
<REFERENCE>19_Y_19_A_ImportedContent_20191007034226/Mai 2018- sujet & corrigé .pdf</REFERENCE>
<SUMMARY></SUMMARY>
<ALLTEXT></ALLTEXT>
<POPUP></POPUP>
<OPTIONS>objectframe</OPTIONS>
<TIMEMODIFIED>1599129271</TIMEMODIFIED>
</MOD>

<REFERENCE>19_Y_19_A_ImportedContent_20191007034226/Mai 2018- sujet & corrigé .pdf</REFERENCE>

should work if it becomes

<REFERENCE>19_Y_19_A_ImportedContent_20191007034226/Mai 2018- sujet & amp; corrigé .pdf</REFERENCE>

Thanks