Question Mattermost on Premium Email

[dahamsta]

Is anyone running Mattermost on Premium Email? I would have sworn I had it working at some point in the past, but now when I try to enable it I get a white screen, both when embedded in Roundcube and standalone. I think the problem is with Mattermost, as the logs seem to suggest that it's shutting itself down, but it's not clear why.

{"level":"info","ts":1604678542.7026021,"caller":"app/web_hub.go:83","msg":"Starting websocket hubs","number_of_hubs":32}
{"level":"info","ts":1604678542.7044258,"caller":"utils/i18n.go:83","msg":"Loaded system translations","for locale":"en","from locale":"/var/www/vhosts/bn.ie/mattermost/i18n/en.json"}
{"level":"info","ts":1604678542.711331,"caller":"sqlstore/supplier.go:227","msg":"Pinging SQL","database":"master"}
{"level":"info","ts":1604678542.7763462,"caller":"app/license.go:54","msg":"License key from https://mattermost.com required to unlock enterprise features."}
{"level":"info","ts":1604678542.781257,"caller":"app/server.go:440","msg":"Current version is 5.26.0 (5.26.1/Tue Aug 25 22:21:22 UTC 2020/dd2f8185dbd9925b25e838cc4f6b12a92a074dec/1324c86d9c434568b3c094ec556ca237d5a97cdc)","current_version":"5.26.0","build_number":"5.26.1","build_date":"Tue Aug 25 22:21:22 UTC 2020","build_hash":"dd2f8185dbd9925b25e838cc4f6b12a92a074dec","build_hash_enterprise":"1324c86d9c434568b3c094ec556ca237d5a97cdc"}
{"level":"info","ts":1604678542.7813213,"caller":"app/server.go:449","msg":"Enterprise Build","enterprise_build":true}
{"level":"info","ts":1604678542.7813575,"caller":"app/server.go:455","msg":"Printing current working","directory":"/opt/psa/admin/htdocs/modules/mattermost"}
{"level":"info","ts":1604678542.7813847,"caller":"app/server.go:456","msg":"Loaded config","source":"file:///var/www/vhosts/bn.ie/mattermost/config/config.json"}
{"level":"info","ts":1604678542.798692,"caller":"sqlstore/post_store.go:1597","msg":"Post.Message has size restrictions","max_characters":16383,"max_bytes":65535}
{"level":"info","ts":1604678542.854217,"caller":"app/server.go:479","msg":"Shutting down advanced logging"}
{"level":"info","ts":1604678542.854878,"caller":"bleveengine/bleve.go:267","msg":"UpdateConf Bleve"}
{"level":"info","ts":1604678542.8557146,"caller":"app/license.go:54","msg":"License key from https://mattermost.com required to unlock enterprise features."}
{"level":"info","ts":1604678543.3351884,"caller":"app/server.go:643","msg":"Stopping Server..."}
{"level":"info","ts":1604678543.3352497,"caller":"app/web_hub.go:115","msg":"stopping websocket hub connections"}
{"level":"info","ts":1604678543.336122,"caller":"app/server.go:721","msg":"Server stopped"}