Repository Error regarding Mattermost Desktop Client for Ubuntu/Debian

Troubleshooting
2

Hi @Salomon and welcome to the Mattermost forums!

This is a known issue and I’ve already Mattermost about it. There’s also a GitHub issue on that topic:

If you do not want to wait for Mattermost to fix it, you can run the following commands:

wget https://deb.packages.mattermost.com/pool/main/m/mattermost-desktop/mattermost-desktop_5.3.1-1_amd64.deb
dpkg -i mattermost-desktop_5.3.1-1_amd64.deb

Update 2023-04-06:
This workaround of course should only be used if the integrity of the file has been verified otherwise. I did not mention it here, but I compared the filesize and hashsums to the ones from GitHub (the official Mattermost release) and found out that a new release has hit the mirrors (5.3.1-495 compared to 5.3.1), so that’s most likely the reason for the difference, but besides that, the source looks good.

This command can be used to download the file directly from GitHub.

wget https://releases.mattermost.com/desktop/5.3.1/mattermost-desktop_5.3.1-1_amd64.deb
dpkg -i mattermost-desktop_5.3.1-1_amd64.deb

Right now, the problem is not solved, the package is still not installable (same error, but a new release (5.3.1-496) on the mirrors).