Could not mount Linux USB : not authorized to perform operation (polkit authority not available and caller is not uid 0)

Now getting this problem when i try to mount my usb flash disc.
The error message below comes up both in E16 and E23.
"not authorized to perform operation (polkit authority not available and caller is not uid 0)"

The problem likely is related to an earlier one which occurs when i created another user account from the desktop menu administrator /users configurator

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Actually "only" when you remove the first user and then later create a user with the same name and use the existing $HOME for that user.

i never removed any user , just added other users but lost the administrator privilleges with the the primary account set up at installation. Tried every thing only solution seems to be to delete the two newer user accounts

Or indeed bite the bullet and start fresh with 3.8.12 (or create a dual boot machine) :madness:

:sob: :sob: :sob:

Finally apug plus Elive-upgrader and a cold reboot saved the day