Question HTTP ERROR 500, Plesk dashboard cannot be accessed

[garyung]

I am using a plesk server via vultr.
I am currently unable to access the Plesk dashboard as I am getting HTTP ERROR 500 and I see the message 500 Plesk\Exception\Database as shown in the attachment.

I can't even log in via root, and I've tried connecting to the Plesk server via SSH, but without success.

How can I free up disk space?
I would be grateful if you could provide a detailed solution to resolve this issue, I am a WordPress user with not much computer knowledge.

 

[Peter Debik]

If you cannot access your server by SSH, please contact your data center for assistance. They can normally attach a device to the system by which you can access the console without using SSH.