Hello,
I was using the latest version to start with but had the same issue, but I didn’t with 8.5.1.
I have however just resolved this, but it’s a bodge and not entirely happy, but it loads.
As my gold image is a VM I reverted back to the snapshot where Mattermost was not installed, I then do the following
Download the latest .msi, loaded up CMD then CD to my downloads folder and ran the following
msiexec /i mattermost…..msi ALLUSERS=1
I then headed to c:\users\localadmin\appdata\roaming\maatermost and opened config.json and changed some things like removing “downloadLocation” remove autostart, disabled acceleration.
I then copied the entire mattermost folder and pasted into c:\users\default\appdata\roaming
I then sealed the image, published, and logged in using a standard domain account and boom it opened.
Why i’ve had to do that i’m really not sure, I don’t know if the Omnissa OS Optimization Tool has done something or FSLogix, or Windows 11.
I did even update our Windows 10 gold image to the latest version by just using msiexec /i mattermost…..msi ALLUSERS=1, this Windows 10 gold image also has the same FSLogix version and that worked perfectly.
So going by that it appears Windows 11 is doing something different, as it’s the only difference between our Windows 10 and Windows 11 gold images.
I’ve also installed many other applications on the Windows 11 gold image and Mattermost was the only problem child, very odd!