Troubleshooting

Upgrade Creating a sub-category to discuss upgrade issues specifically. Please make sure to reference the version to which you're upgrading and include a link to the upgrade guide you're following. Off-Topic Topics unrelated to building and using Mattermost software. Release Notes Release notes are issues pertaining to a stable release. Unanswered Topics in this category have been flagged by a mod to ask the community for help in answering the question. GitLab Mattermost The GitLab Mattermost Troubleshooting Forum is a peer-to-peer forum for helping to solve installation and configuration issues from the Mattermost community. Mobile Apps Docs - Help Wanted This sub-category is designed to quickly share notes on product features and product changes ahead of their addition into the official documentation. Command Line Interface

Topic	Replies	Views	Activity
Mattermost Desktop App 5.11 – Important Compatibility Notice Troubleshooting	13	39562	June 19, 2025
[SOLVED] How can I delete teams? Troubleshooting	12	40175	May 10, 2017
[SOLVED] Android App connect to Mattermost team link Troubleshooting	29	14558	October 25, 2017
[SOLVED] Troubleshooting "There was a problem connecting the video call." errors Troubleshooting	33	22028	January 18, 2018
[Solved] Infinite refresh loop in browser clients, with "Invalid or expired session" log error spam Troubleshooting	63	24230	November 20, 2017
[Solved] How can I delete a channel? Troubleshooting	11	46863	July 30, 2023
[Solved] Error: Please check connection, Mattermost unreachable. If issue persists, ask administrator to check WebSocket port Troubleshooting	24	17121	January 8, 2025
How to start WebRTC? Troubleshooting	39	22405	March 27, 2020
Compiling on ARM Troubleshooting	12	6668	May 22, 2019
[SOLVED] TLS handhshake error :; acme: Could not find solver for: http-01; acme: Could not find solver for: dns-01 Troubleshooting	18	15929	November 7, 2023
Upgrading to GitLab Mattermost in GitLab 8.9 Troubleshooting	26	22504	July 7, 2016
Nginx proxy config - websocket connections get 403 Troubleshooting	12	17979	November 7, 2017
[SOLVED] How do I back up a GitLab Mattermost database? Troubleshooting	9	11017	July 24, 2019
How to merge channels or move messages? Troubleshooting	12	9227	May 24, 2025
[Solved] Error message when trying to launch a Zoom videoconference Troubleshooting	10	9583	June 18, 2019
[Solved] GitLab and Mattermost on SSL with self-signed certs Troubleshooting	12	27480	September 20, 2016
Marking users away from Mattermost vs away from computer Troubleshooting	12	15240	March 28, 2018
[SOLVED] Curl(?) differences linux/windows Command Line Interface	9	30242	August 31, 2017
Where to find Mattermost after installing GitLab omnibus? Troubleshooting	14	23800	May 28, 2018
[Solved] Webhooks `No text specified [details: ]` error Troubleshooting	23	18387	November 10, 2017
Convert group messages to private channel Troubleshooting	16	12050	November 11, 2022
Setting up using Docker Troubleshooting	78	9761	August 30, 2022
[SOLVED] Changing from HTTP to HTTPS results in ERR_CONNECTION_REFUSED for both Mattermost & GitLab Troubleshooting	16	20563	November 23, 2017
[Solved] Mattermost websocket error Troubleshooting	10	24965	August 16, 2023
How to fix websocket error? Troubleshooting	12	22900	August 20, 2018
[Solved] No System Console when logging in with GitLab Troubleshooting	20	16506	March 15, 2016
[SOLVED] Incoming Webhook cannot send result to user Troubleshooting	17	16029	August 12, 2017
Mattermost marking users "offline" when they are "away" Troubleshooting	43	9990	July 1, 2019
[Solved] TLS Handshake Error - TLS unknown certificate Troubleshooting	17	15201	February 6, 2024
Desktop Application Notification sound not working Troubleshooting	15	15574	November 26, 2020
Video Preview (non-youtube) Troubleshooting	26	11810	May 22, 2023
iOS mobile app 1.9.0 doesn’t work with Japanese keyboard Mobile Apps	14	2763	July 6, 2018
Resetting Gitlab Omnibus Mattermost installation Troubleshooting	12	16681	May 11, 2016
LDAP in the open source version Troubleshooting	10	18027	May 31, 2023
[SOLVED] Proxy settings for outgoing connections, e.g. push-proxy Troubleshooting	10	5636	May 23, 2017
How do Video Preview Links work Troubleshooting	14	14979	February 28, 2018
Questions about open and free version Troubleshooting	13	8622	August 29, 2024
Launch queries on the Mattermost API, having Gitlab as authentication provider Troubleshooting	11	9279	February 25, 2017
"Processing" during image upload Troubleshooting	23	6528	April 17, 2020
Bad response from token request after team creation auth Troubleshooting	19	12360	November 18, 2016
Constant websocket errors Troubleshooting	39	8662	July 21, 2022
Using python script in Incoming Webhook Troubleshooting	21	11623	December 23, 2019
Mattermost send email notification problems Troubleshooting	98	5473	February 18, 2021
[SOLVED] Direct Message with REST API issue Troubleshooting	12	15022	January 12, 2018
Unusable after upgrade to 5.25.1 Troubleshooting	20	11630	January 19, 2021
Upgraded from 3.7 to 3.8 broke websockets! help! Troubleshooting	27	5319	May 8, 2017
Migrating from MariaDB to PostgreSQL DB Troubleshooting	16	6765	January 18, 2024
Why do you use Jira, not Gitlab? Troubleshooting	10	14796	August 5, 2016
How can I update the Mattermost installation on my QNAP device? Troubleshooting	9	4893	August 9, 2021
Using CTRL/CMD+UP to reply to a message Troubleshooting	27	5121	May 22, 2017