# Calendar notifications slow or freeze GUI **URL:** \ **Category:** English\ **Created:** [June 12, 2020, 3:16pm UTC](https://help.egroupware.org/t/calendar-notifications-slow-or-freeze-gui/74787 "2020-06-12T15:16:02Z")\ **Posts on this page:** 1\ **Showing post:** 8
**Author:** ![StefanU](https://help.egroupware.org/user_avatar/help.egroupware.org/stefanu/32/11_2.png) [@StefanU](https://help.egroupware.org/u/StefanU)\ **Post date:** [June 12, 2020, 7:50pm UTC](https://help.egroupware.org/t/calendar-notifications-slow-or-freeze-gui/74787/8 "2020-06-12T19:50:40Z")
> [@Gregory](#): > > For the update, I tried once but I have an nginx error “502 BAD GATEWAY”, and 502 we had several times a few months ago. There were different constellations that caused this. But we should avoid them mostly by correcting the installation scripts. So I have to ask: When did you try this? When’s the installation date? You should read this: Wiki: [19.1 Installation using egroupware docker RPM DEB package](https://github.com/EGroupware/egroupware/wiki/19.1--Installation-using-egroupware-docker-RPM-DEB-package) [19.1 Release notes and distribution specific instructions](https://github.com/EGroupware/egroupware/wiki/19.1-Release-notes-and-distribution-specific-instructions) [Update recommendations and troubleshooting](https://github.com/EGroupware/egroupware/wiki/Update-recommendations-and-troubleshooting) Forum: [🇬🇧 My installation of EGroupware 19.1 on Debian 10](https://help.egroupware.org/t/uk-my-installation-of-egroupware-19-1-on-debian-10/73996) [🇬🇧 Docker (in EGroupware 19.1)?](https://help.egroupware.org/t/uk-docker-in-egroupware-19-1/73811) And from here, of course: [EGroupware 19.1 Release Notes / Changelog](https://help.egroupware.org/t/egroupware-19-1-release-notes-changelog/73975) If you try it again and you find such a problem, create a new (!) topic here in the forum. Until then please mark this one as solved. > [@User manual Forum](https://help.egroupware.org/t/user-manual-forum/70794#solved): > > This manual explains how to use the forum. This manual is under construction and therefore not finished. Please send hints and suggestions to @StefanU. Content: [1. User login / manage](#discourse)[Login](#login)[Manage user account](#manageuseraccount)[Maintenance of user account](#maintenanceuseraccount)[2. Beiträge](#discourse)[Create topic](#createtopic)[Answer](#answer)[Quote](#quote)[Inserting hardcopies](#hardcopies)[Attach files](#files)[Insert Web link](#weblink)[Mark as solved](#solved)[Format](#format)[Advanced formatting with Markdown](#markdown)[3. Mailing list mode](#discourse)[Mailing list mode](#mailinglist)[4. RSS](#discourse)[RSS](#rss)[Login](#login) You can log in to the forum with your username … Stefan --- _[View the full topic](https://help.egroupware.org/t/calendar-notifications-slow-or-freeze-gui/74787)._