I Recently upgraded both, the platform and most of the applications.
Now on a call for LibreOffice it shows the small window for startup, tells me something about a repository for bundled extensions, announces starting a danish (?!) spell checking dictionary and then ...
The progress bar reaches about 50% ...
The LO-startup-window vanishes and no further action is to be seen.
I have tried both: the upgrade by PortableApps and the ...paf.exe from LibreOffice site. Same result.
A windows install of LO (same version) on the same system works fine.
You know the solution? Please let me know too!