My musescore file broke down. Can someone repair it?

I am not capable, but waiting for another answer look on your pc:
https://musescore.org/en/handbook/file-formats-0#msczcomma
https://musescore.org/en/node/52116

Hmm, self-built from master crashes too. Famous last words:
Debug: Ryszardzik: xml unknown tag at line 3729 col 18: Symbol (...\MuseScore\libmscore\xmlreader.cpp:189, void Ms::XmlReader::unknown())
Debug: Ryszardzik: xml unknown tag at line 5921 col 18: Symbol (...\MuseScore\libmscore\xmlreader.cpp:189, void Ms::XmlReader::unknown())
Debug: Tuplet 0x27034458 sanitized (...\MuseScore\libmscore\tuplet.cpp:1115, void Ms::Tuplet::sanitizeTuplet())

line 3729 is: accdnRH3RanksBassoon
line 5921 is is: accdnRH3RanksPiccolo

No idea whether this is related in any form or shape

Stack trace:
1 QVector::contains qvector.h 852 0xe3113c
2 Ms::Note::addSpannerBack note.h 473 0xd38712
3 Ms::Note::readProperties note.cpp 1410 0x816dd2
4 Ms::readNote read206.cpp 550 0x943036
5 Ms::readChord read206.cpp 640 0x94379c
6 Ms::readMeasure read206.cpp 902 0x94454c
7 Ms::readStaffContent read206.cpp 1330 0x946be5
8 Ms::readScore read206.cpp 1475 0x947bff
9 Ms::MasterScore::read206 read206.cpp 1738 0x94976e
10 Ms::MasterScore::read1 scorefile.cpp 917 0x83b876
11 Ms::MasterScore::loadMsc scorefile.cpp 837 0x83afaf
12 Ms::MasterScore::loadMsc scorefile.cpp 826 0x83ae8a
13 Ms::readScore file.cpp 2079 0x5a8979
14 Ms::MuseScore::readScore file.cpp 331 0x59906d
15 Ms::MuseScore::openScore file.cpp 310 0x598f0a
16 Ms::MuseScore::loadFiles file.cpp 291 0x598bcc
17 Ms::MuseScore::cmd musescore.cpp 4678 0x49f222
18 Ms::MuseScore::cmd musescore.cpp 4533 0x49e8b8
19 Ms::MuseScore::qt_static_metacall moc_musescore_IKSZSQWDH4YDZS.cpp 733 0x69a52e
20 ZN11QMetaObject8activateEP7QObjectiiPPv 0x68a08942
...

It doesn't like something about a Glissando somewhere