Ubuntu Mate comes with Libre Office but since I am used to work with WPS, I have downloaded WPS Office from their website and tried to install it with the package installer and got this error message:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libpng12-0 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'libpng12-0' has no installation candidate