Summary mattermost client alert a red bar on the top ,shows Please check connection, Mattermost unreachable. If issue persists, ask administrator to check WebSocket port Steps to reproduce My site is mattermost 5.19.1 on windows 2016 with reverse proxy on IIS <config.json> { “ServiceSettings”…

Failed to upgrade websocket connection

robert9780 (robert lo) February 14, 2020, 8:48am 8

@ahmaddanial
I add the origin to ‘AllowCorsFrom’ parameter in config.json and it works!
Thanks for your help!

2 Likes

Self-Hosting Issues with Calls Plugin over HTTPS

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