The error massage was:'
Error:BrokenCount>0'.
it said that
"this usually means that your installed packages have unmet dependencies."
What to do??!?!
Make sure the repo sources are up to date and not broken:
sudo rm -rf /var/lib/apt/lists/* #remove repo cache
sudo apt-get update #renew repo cache
Try to Install the package again.
sudo apt-get install packagename
Once the package determines that you have some missing dependencies, run the following command to fix broken or missing dependencies.
sudo apt-get install -f
Above command will only download the missing dependencies if you have already installed the package.
Try pressing ctrl+alt+f1, logging in as your user, and running sudo apt-get update && sudo apt-get upgrade && sudo apt-get install -f
. You can get back to the GUI by pressing ctrl+alt+f7