I hit this bug today, the installed plugin were not anymore available
the plugins have been disabled, I needed to add the full path in config.json
- "Directory": "./plugins",
- "ClientDirectory": "./client/plugins",
+ "Directory": "/opt/mattermost/plugins",
+ "ClientDirectory": "/opt/mattermost/client/plugins",
I found in logs
{"level":"error","ts":1614290111.7581637,"caller":"app/plugin.go:178","msg":"Failed to start up plugins","error":"mkdir ./client/plugins: no such file or directory"}