libreoffice 6 not working

I’m using LinuxMint 18.2.
I tried to upgrade to LO 6-RC1:

  • downladed the deb file, opened it
  • installed using sudo dpkg-i *.deb

Ther program installs withou a problem. In the “Office” menu, I can see that LO 5 and LO^are installed; when opening any of the LO 6 programs, it doesn’t open.

I removed both instances of LO, reinstalled only LO 6, and the same thing happens. I finished reinstalling LO 5.

What I’m doing wrong?

Linux Mint - that one that can use the PPA?

@JPSanchez: Please do not use the “community wiki” checkbox when asking questions.