Desktop: Cannot read property 'display_name' of undefined

[PovilasKud]

Everything worked fine, but suddenly I get a blank white screen when I open Mattermost desktop app.
I can see this error in devtools console:

Loading zoom plugin index_bundle.js:28189
Loading bigbluebutton plugin index_bundle.js:28189
Loaded zoom plugin index_bundle.js:28189
websocket connecting to wss://mattermost.meridia.land/api/v4/websocket index_bundle.js:28195 TypeError: Cannot read property 'display_name' of undefined
webview.addEventListener.e @ index_bundle.js:28195 index_bundle.js:28195
Uncaught TypeError: Cannot read property 'display_name' of undefined

Screenshot: https://prnt.sc/ltg2bb

For other users in our company, everything works fine.

I can't recall anything that changed on my system, except that I have cloned this repo https://github.com/electron-react-boilerplate/electron-react-boilerplate and installed dependencies + installed Yarn.

OS: MacOS Mojave
Mattermost v: 4.2.0
Npm v: 6.5.0

Any ideas ?

[yuya-oc]

As far as looking the error, it seems that webapp failed to load data by some reason. So I feel it should happen also on web browsers though, would you check? And are other users also using the desktop app on macOS?

[PovilasKud]

As far as looking the error, it seems that webapp failed to load data by some reason. So I feel it should happen also on web browsers though, would you check? And are other users also using the desktop app on macOS?

The browser version works fine. I have tested both on Firefox and Chrome.
Other users use desktop apps both Windows and MacOS and they have no such problem.

Any other logs I can provide?
Can NPM or YARN installing packages globally or locally can cause such problem?

[ReDucTor]

I'm having the same issue on Windows v4.2.0

[PovilasKud]

I'm having the same issue on Windows v4.2.0

Is that a fresh install ?
Do you recall any changes you did that caused this issue?

[ReDucTor]

It's a fresh install, also a reoccurring issue and multiple people at my work have had similar issues.

I've worked out a workaround deleting %appdata%\Mattermost\Local Storage

I haven't found any specific steps to reproduce

[PovilasKud]

It's a fresh install, also a reoccurring issue and multiple people at my work have had similar issues.

I've worked out a workaround deleting %appdata%\Mattermost\Local Storage

I haven't found any specific steps to reproduce

Thanks, that solved the problem on on mac too!

MacOS:
sudo rm -rf ~/Library/Application Support/Mattermost

CAUTION: This will delete all saved servers. Pretty much same as having fresh install.

[amyblais]

Closing this as there is a workaround,

[PovilasKud]

Was able to reproduce this issue.

The steps are - clicking on your own username in left sidebar.

Same happens both on Mac and Windows machines.

[bakasmarius]

It also happened to me when I clicked on my own username on the left sidebar under DIRECT MESSAGES. Then for a half a second I was able to see my whole workspace when I went through all the possible menu items, but the gray screen came straight back.

[bakasmarius]

I can now also confirm that this bug can be reproduced by trying to add yourself to DIRECT MESSAGES list.

[bakasmarius]

It also happened when I left one of the channels, but this time reloading a window helped, so I guess it's a different, but related issue.

[amyblais]

Hi all, what Mattermost server version are you on?

[systems-levigo]

We get the same error when we open email notifications.
No errors in the server logs. Only the browser DevConsole shows the

Cannot read property 'display_name' of undefined

Server version 5.18.0.