Can't install Mullvad and Express VPN's > 'no permission to install software'


I'm new to Zorin and trying to install Mullvad VPN and Express VPN, but can't because 'unable to install Mullvad/Express VPN. you do not have permission to install software.'

I have the deb files of both, but can't install and have no clue how to fix this.

If you do, your help is much appreciated.


See if any solutions proffered in this ubuntu thread help:

Thank you

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