[SOLVED] Can't sudo as an "Administrator" user

[benchristel]

Hello, all! I'm running into a problem that has me stumped.

I added an "Administrator" user from System Settings > Users and Groups. I expected to be able to sudo as this user. But when I log in as the user in the desktop environment, it seems I can't:

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$ sudo ls .
[sudo] password for test220526:         
Sorry, user test220526 is not allowed to execute '/usr/bin/ls .' as root on hostname.

Here is the output of `id`:

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$ id test220526
uid=1002(test220526) gid=1002(test220526) groups=1002(test220526),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),114(lpadmin),134(sambashare)

I'm using Linux Mint 20.3 Edge with Cinnamon.

Thanks in advance for any tips you can provide!

[trytip]

does this work?

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sudo -i
ls

[benchristel]

does this work?

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sudo -i
ls

Nope. Here's the output:

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$ sudo -i
[sudo] password for test220526:         
Sorry, user test220526 is not allowed to execute '/bin/bash' as root on hostname.

EDIT: Solved the problem by rebooting. Now sudo runs commands without error.

[pbear]

If that worked, logging out then back in probably would have worked also without a reboot.