Calc file will not open in calc, but will open in excel

Hello,
I was trying to open a spreadsheet I created with calc some time ago and the program will simply stop responding.
I updated my libre office to 6.3.0.4 on Windows 10 home in hope to fix the issue, but the file refuses to open no matter what.
The strange thing is that it opens without any problem when I use Excel 365… I can resave the file with excel, but I was wondering why it is acting this way.
Best regards

This looks like a bug (if it is also reproducible with fresh user profile). Please file it, and attach a sample file to the report.

Maybe a bit easier for test, through Menu/Help/Restart in Safe Mode, if you can open LibreOffice.