Corrupted files ("not a zip file")

I have problem with the newest version. Program sometimes saves files and they are unoppenable. They can't be oppened also as a zip archive.
All ".mscbackup" files are also corrupted.

2025-07-17T10:57:07.119 | WARN | main_thread | Qt | qrc:/qml/Muse/UiComponents/FlatButton.qml:186:5: QML Loader: Binding loop detected for property "itemImplicitWidth"
2025-07-17T10:57:07.469 | INFO | main_thread | ActionsDispatcher::doDispatch | try call action: file-open
2025-07-17T10:57:07.469 | INFO | main_thread | ProjectActionsController::openProject | Try open project: url = "file:///C:/Users/macie/Desktop/O Bartłomieju, w niebiosach.mscz" , displayNameOverride = ""
2025-07-17T10:57:07.726 | INFO | main_thread | ::operator | No problems detected with graphics api
2025-07-17T10:57:07.974 | WARN | main_thread | Impl::scanFiles | Zip: not a zip file!
2025-07-17T10:57:07.974 | ERROR | main_thread | XmlStreamReader::setData | XML_ERROR_EMPTY_DOCUMENT
2025-07-17T10:57:07.974 | ERROR | main_thread | NotationProject::load | failed load, err: [2010]
2025-07-17T10:57:08.453 | ERROR | main_thread | ::operator | Unable to check for update, error: [1701]
2025-07-17T10:57:14.136 | ERROR | main_thread | ::operator | error: qrc:/qml/NotationPage/NotationStatusBar.qml:107:9: QML FlatButton: Binding loop detected for property "text"
2025-07-17T10:57:14.136 | WARN | main_thread | Qt | qrc:/qml/NotationPage/NotationStatusBar.qml:107:9: QML FlatButton: Binding loop detected for property "text"
2025-07-17T10:57:14.136 | ERROR | main_thread | ::operator | error: qrc:/qml/NotationPage/NotationStatusBar.qml:107:9: QML FlatButton: Binding loop detected for property "text"
2025-07-17T10:57:14.136 | WARN | main_thread | Qt | qrc:/qml/NotationPage/NotationStatusBar.qml:107:9: QML FlatButton: Binding loop detected for property "text"
2025-07-17T10:57:14.140 | INFO | main_thread | Profiler |