Quote:
Error: Can't create user mgrtest
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User mgrtest (it used for testing services after installation) already exist, it can be because first installation failed.
You can ignore it or delete user mgrtest (from ISPmanager if it possible from
https://your-server-ipaddress/manager/ispmgr) and run again, but you do not need it.
Quote:
Error: Unable to determine mysql-server
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MySQL already installed into your server or installation procedure failed, you need check this and fix error (possible install by himself manually) and configure connection ISPmanager with MySQL (ISPmanager - Server configuration - Database servers)