A family of Microsoft word processing software products for creating web, email, and print documents.
You are not reading what I am saying :-)
As I said before, what you must do first and foremost is link your Computer Account with your Microsoft Account. Read the instructions on the OneDrive splash screen. It says exactly that.
If you then open OneDrive, the app will work correctly. For me this fixed the crashing of Word when trying to open files directly from onedrive.com.
After that, since I don't care for this moronic and draconian integration with Microsoft Account, I remove the integration. This disabled the onedrive app on my PC (the ability to cache onedrive.com files on my computer - like dropbox does). However I don't care for it as I only use onedrive directly from Office applications (which is the main issue of this forum post) and that got fixed with the steps I mentioned above.