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Every time I open the appcenter there is a message of "Failed to fetch updates" Everything seems to be working fine, but I would like to solve it

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Here is the full content of the window

W: Ignoring file 'brave-hera.list.' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension E: Release file for http://packages.elementary.io/appcenter/dists/bionic/InRelease is not valid yet (invalid for another 7h 57min 2s). Updates for this repository will not be applied. E: Release file for http://security.ubuntu.com/ubuntu/dists/bionic-security/InRelease is not valid yet (invalid for another 1h 9min 2s). Updates for this repository will not be applied. E: Release file for http://it.archive.ubuntu.com/ubuntu/dists/bionic-updates/InRelease is not valid yet (invalid for another 3h 17min 26s). Updates for this repository will not be applied. E: Release file for http://it.archive.ubuntu.com/ubuntu/dists/bionic-backports/InRelease is not valid yet (invalid for another 1h 11min 15s). Updates for this repository will not be applied. E: The repository 'http://ppa.launchpad.net/nvbn-rm/ppa/ubuntu bionic Release' does not have a Release file. W: Updating from such a repository can't be done securely, and is therefore disabled by default. W: See apt-secure(8) manpage for repository creation and user configuration details. E: Release file for http://ppa.launchpad.net/elementary-os/stable/ubuntu/dists/bionic/InRelease is not valid yet (invalid for another 7h 26min 49s). Updates for this repository will not be applied

Thank you very much for your help in advance.

  • Is the time and date set correctly on your computer? – David Hewitt Mar 5 at 12:50
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You might have broken packages. Try the following it terminal you might need to install aptitude with sudo apt-get install aptitude sudo aptitude update && sudo aptitude safe-upgrade hope this helps

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  • Sorry for the delay. I ran aptitude, but the problem still persists, thank you for your help. – Matteo Bertozzi Mar 3 at 18:19
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AppCenter is attempting to check for Operating Software Updates.

The solution is to update/correct the source lists included with the distribution.

Replace all instances of "hera" with "bionic" (in 5.1 Hera) in the following 4 files:

/etc/apt/sources.list
/etc/apt/sources.list.d/elementary.list
/etc/apt/sources.list.d/patches.list
/etc/apt/sources.list.d/appcenter.list

Once I made these changes, AppCenter was able to apply about 30+ updates and the dialog box has not reappeared.

I would recommend doing this right away as at least one of the updates is a security update.

A bug has been filed in GitHub (os#316)

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