Error "You are not allowed to perform this action"

Hi Community,

I need assistance, I just installed Ubuntu Mate 16.04. I updated the system completely after the installation.
Then, I wanted to test the Cinnamon Environment so I installed it by typing the following commands in the terminal:

sudo add-apt-repository ppa:embrosyn/cinnamon
sudo apt-get update && sudo apt-get install cinnamon cinnamon-core

The cinnamon interface works just fine, the problem now is that when I try to install any software from Software Boutique, the following error message appears:

When I go back to Mate interface Software Boutique works perfectly.

Will it be an issue with the Cinnamon Environment?

Hi @DiegoJC,

I’m not sure but it might be a compatibility issue with “Welcome” under Cinnamon but like I said; I’m not sure, maybe @lah7 can answer that for you?. :smiley:

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PolicyKit Authentication Agent needs to be running and added to your start-up applications within the Cinnamon desktop:

/usr/lib/x86_64-linux-gnu/polkit-mate/polkit-mate-authentication-agent-1

In MATE, it’s already checked in your Start-up Applications. I think this will work outside of the MATE desktop.

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Thanks guys,

Adding the command suggested to start-up applications within the Cinnamon desktop worked :slight_smile:

Issue is solved.

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