# Unable to access pre-release.mattermost.com
**URL:** https://forum.mattermost.com/t/unable-to-access-pre-release-mattermost-com/4411
**Category:** Troubleshooting
**Created:** [January 22, 2018, 10:29am UTC](https://forum.mattermost.com/t/unable-to-access-pre-release-mattermost-com/4411 "2018-01-22T10:29:01Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@pichouk](https://forum.mattermost.com/u/pichouk)
#### Post date: [January 22, 2018, 10:29am UTC](https://forum.mattermost.com/t/unable-to-access-pre-release-mattermost-com/4411/1 "2018-01-22T10:29:01Z")
#### Summary
When trying to access [https://pre-release.mattermost.com](https://pre-release.mattermost.com) it crash to a blank screen.
#### Steps to reproduce
Using Firefox `57.0.4` or Chromium `62.0.3202.89` on Linux (Debian Buster), try access to [https://pre-release.mattermost.com](https://pre-release.mattermost.com). After login page, the Web UI load and crash suddenly.
#### Expected behavior
It should just works fine 🙂
#### Observed behavior
When looking at my Web console, it show that the browser try to make a `POST` request to `https://pre-release.mattermost.com/api/v4/roles/names` which [doesn’t seems to exists](https://api.mattermost.com/) and returned a 404 error. Then a React error `Cannot read property 'top' of undefined` pop and UI stopped to load. I just dumped you the error message, not sure it help
> **Error log**
>
> ```auto
> TypeError: Cannot read property 'top' of undefined
> at t.updateUnreadIndicators (sidebar.jsx:308)
> at t.value (sidebar.jsx:149)
> at updateClassInstance (react-dom.production.min.js:115)
> at beginWork (react-dom.production.min.js:137)
> at r (react-dom.production.min.js:164)
> at i (react-dom.production.min.js:164)
> at s (react-dom.production.min.js:165)
> at y (react-dom.production.min.js:171)
> at v (react-dom.production.min.js:171)
> at m (react-dom.production.min.js:169)
> l @ react-dom.production.min.js:167
> s @ react-dom.production.min.js:165
> y @ react-dom.production.min.js:171
> v @ react-dom.production.min.js:171
> m @ react-dom.production.min.js:169
> p @ react-dom.production.min.js:168
> enqueueSetState @ react-dom.production.min.js:111
> r.setState @ react.production.min.js:15
> u.onStateChange @ connectAdvanced.js:209
> notify @ Subscription.js:30
> e.notifyNestedSubs @ Subscription.js:69
> u.onStateChange @ connectAdvanced.js:206
> notify @ Subscription.js:30
> e.notifyNestedSubs @ Subscription.js:69
> u.onStateChange @ connectAdvanced.js:206
> u @ createStore.js:176
> (anonymous) @ index.js:18
> (anonymous) @ middleware.js:85
> (anonymous) @ channels.js:1388
> a @ runtime.js:69
> (anonymous) @ runtime.js:307
> e.(anonymous function) @ runtime.js:121
> a @ channels.js:66
> (anonymous) @ channels.js:66
> Promise resolved (async)
> a @ channels.js:66
> (anonymous) @ channels.js:66
> (anonymous) @ channels.js:66
> (anonymous) @ channels.js:1401
> (anonymous) @ global_actions.jsx:56
> Promise resolved (async)
> t @ global_actions.jsx:54
> o @ global_actions.jsx:93
> (anonymous) @ route_team.jsx:59
> Promise resolved (async)
> i @ route_team.jsx:50
> o @ route_team.jsx:33
> o @ TransitionUtils.js:47
> (anonymous) @ TransitionUtils.js:118
> (anonymous) @ TransitionUtils.js:88
> r @ AsyncUtils.js:38
> a @ AsyncUtils.js:55
> a @ TransitionUtils.js:87
> r @ TransitionUtils.js:111
> (anonymous) @ createTransitionManager.js:74
> a @ TransitionUtils.js:78
> s @ TransitionUtils.js:135
> f @ createTransitionManager.js:71
> (anonymous) @ createTransitionManager.js:49
> r @ AsyncUtils.js:45
> a @ AsyncUtils.js:55
> l @ matchRoutes.js:235
> r @ createTransitionManager.js:45
> n @ createTransitionManager.js:226
> b @ createTransitionManager.js:250
> componentWillMount @ Router.js:100
> mountClassInstance @ react-dom.production.min.js:113
> beginWork @ react-dom.production.min.js:137
> r @ react-dom.production.min.js:164
> i @ react-dom.production.min.js:164
> s @ react-dom.production.min.js:165
> y @ react-dom.production.min.js:171
> v @ react-dom.production.min.js:171
> m @ react-dom.production.min.js:169
> p @ react-dom.production.min.js:168
> updateContainer @ react-dom.production.min.js:177
> (anonymous) @ react-dom.production.min.js:227
> unbatchedUpdates @ react-dom.production.min.js:174
> hn @ react-dom.production.min.js:227
> render @ react-dom.production.min.js:229
> o @ root.jsx:121
> (anonymous) @ root.jsx:98
> l @ jquery.js:3321
> fireWith @ jquery.js:3451
> c @ jquery.js:3646
> u @ jquery.js:3655
> setTimeout (async)
> (anonymous) @ jquery.js:3693
> l @ jquery.js:3321
> fireWith @ jquery.js:3451
> fire @ jquery.js:3459
> l @ jquery.js:3321
> fireWith @ jquery.js:3451
> o.(anonymous function) @ jquery.js:3782
> l @ jquery.js:3321
> fireWith @ jquery.js:3451
> o.(anonymous function) @ jquery.js:3782
> (anonymous) @ root.jsx:66
> Promise resolved (async)
> (anonymous) @ user_actions.jsx:67
> a @ runtime.js:69
> (anonymous) @ runtime.js:303
> e.(anonymous function) @ runtime.js:121
> a @ asyncToGenerator.js:21
> (anonymous) @ asyncToGenerator.js:32
> Promise resolved (async)
> a @ asyncToGenerator.js:31
> (anonymous) @ asyncToGenerator.js:39
> t @ _export.js:39
> (anonymous) @ asyncToGenerator.js:18
> (anonymous) @ main.6a552575d371e3a8b032.js:26302
> r @ root.jsx:66
> (anonymous) @ root.jsx:157
> window.onload @ root.jsx:147
>
> ```
---
### Author:  [@pichouk](https://forum.mattermost.com/u/pichouk)
#### Post date: [January 22, 2018, 2:08pm UTC](https://forum.mattermost.com/t/unable-to-access-pre-release-mattermost-com/4411/2 "2018-01-22T14:08:32Z")
Ok, seems to be fixed or something, but it works now.
---
### Author:  [@lindy65](https://forum.mattermost.com/u/lindy65)
#### Post date: [January 23, 2018, 8:19am UTC](https://forum.mattermost.com/t/unable-to-access-pre-release-mattermost-com/4411/3 "2018-01-23T08:19:05Z")
Thanks @pichouk
We did have a bug but it was fixed yesterday so everything should be fine now.